1689611453 has 8 divisors (see below), whose sum is σ = 1789608888. Its totient is φ = 1589681664.

The previous prime is 1689611449. The next prime is 1689611477. The reversal of 1689611453 is 3541169861.

It can be written as a sum of positive squares in 4 ways, for example, as 750924409 + 938687044 = 27403^2 + 30638^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1689611453 - 2² = 1689611449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689611653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40025 + ... + 70577.

It is an arithmetic number, because the mean of its divisors is an integer number (223701111).

Almost surely, 2^1689611453 is an apocalyptic number.

It is an amenable number.

1689611453 is a deficient number, since it is larger than the sum of its proper divisors (99997435).

1689611453 is a wasteful number, since it uses less digits than its factorization.

1689611453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33823.

The product of its digits is 155520, while the sum is 44.

The square root of 1689611453 is about 41104.8835663112. The cubic root of 1689611453 is about 1191.0471335328.

The spelling of 1689611453 in words is "one billion, six hundred eighty-nine million, six hundred eleven thousand, four hundred fifty-three".