1689695137 has 8 divisors (see below), whose sum is σ = 1915444160. Its totient is φ = 1477627920.

The previous prime is 1689695113. The next prime is 1689695141. The reversal of 1689695137 is 7315969861.

It is a happy number.

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 1689695137 - 2⁷ = 1689695009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689695107) 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, 3420189 + ... + 3420682.

It is an arithmetic number, because the mean of its divisors is an integer number (239430520).

Almost surely, 2^1689695137 is an apocalyptic number.

It is an amenable number.

1689695137 is a deficient number, since it is larger than the sum of its proper divisors (225749023).

1689695137 is a wasteful number, since it uses less digits than its factorization.

1689695137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840903.

The product of its digits is 2449440, while the sum is 55.

The square root of 1689695137 is about 41105.9014862830. The cubic root of 1689695137 is about 1191.0667968194.

The spelling of 1689695137 in words is "one billion, six hundred eighty-nine million, six hundred ninety-five thousand, one hundred thirty-seven".