157695989 has 8 divisors (see below), whose sum is σ = 172163232. Its totient is φ = 143250640.

The previous prime is 157695959. The next prime is 157696003. The reversal of 157695989 is 989596751.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157695989 is a prime.

It is a super-3 number, since 3×157695989³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157695959) 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, 12047 + ... + 21459.

It is an arithmetic number, because the mean of its divisors is an integer number (21520404).

Almost surely, 2^157695989 is an apocalyptic number.

It is an amenable number.

157695989 is a deficient number, since it is larger than the sum of its proper divisors (14467243).

157695989 is a wasteful number, since it uses less digits than its factorization.

157695989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10947.

The product of its digits is 6123600, while the sum is 59.

The square root of 157695989 is about 12557.7063590450. The cubic root of 157695989 is about 540.2650607735.

The spelling of 157695989 in words is "one hundred fifty-seven million, six hundred ninety-five thousand, nine hundred eighty-nine".