1691676900 has 135 divisors (see below), whose sum is σ = 5495773899. Its totient is φ = 450126720.

The previous prime is 1691676893. The next prime is 1691676901. The reversal of 1691676900 is 96761961.

The square root of 1691676900 is 41130.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 117809316 + 1573867584 = 10854^2 + 39672^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is a super-2 number, since 2×1691676900² = 5723541467987220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1691676901) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 3701472 + ... + 3701928.

Almost surely, 2^1691676900 is an apocalyptic number.

1691676900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1691676900 is the 41130-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1691676900

1691676900 is an abundant number, since it is smaller than the sum of its proper divisors (3804096999).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1691676900 is an equidigital number, since it uses as much as digits as its factorization.

1691676900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The cubic root of 1691676900 is about 1191.5322634101.

The spelling of 1691676900 in words is "one billion, six hundred ninety-one million, six hundred seventy-six thousand, nine hundred".