1693997690 has 64 divisors (see below), whose sum is σ = 3835434240. Its totient is φ = 523299840.

The previous prime is 1693997689. The next prime is 1693997699. The reversal of 1693997690 is 967993961.

It is a super-2 number, since 2×1693997690² = 5739256347450672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1693997699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77276 + ... + 96744.

It is an arithmetic number, because the mean of its divisors is an integer number (59928660).

Almost surely, 2^1693997690 is an apocalyptic number.

1693997690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1693997690 is an abundant number, since it is smaller than the sum of its proper divisors (2141436550).

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

1693997690 is a wasteful number, since it uses less digits than its factorization.

1693997690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19607.

The product of its (nonzero) digits is 4960116, while the sum is 59.

The square root of 1693997690 is about 41158.2031920734. The cubic root of 1693997690 is about 1192.0768970744.

The spelling of 1693997690 in words is "one billion, six hundred ninety-three million, nine hundred ninety-seven thousand, six hundred ninety".