157388609 has 24 divisors (see below), whose sum is σ = 198018240. Its totient is φ = 122192928.

The previous prime is 157388587. The next prime is 157388617. The reversal of 157388609 is 906883751.

It is a happy number.

It is not a de Polignac number, because 157388609 - 2¹⁶ = 157323073 is a prime.

It is a super-4 number, since 4×157388609⁴ (a number of 34 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (157388629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69239 + ... + 71475.

It is an arithmetic number, because the mean of its divisors is an integer number (8250760).

Almost surely, 2^157388609 is an apocalyptic number.

157388609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

157388609 is a deficient number, since it is larger than the sum of its proper divisors (40629631).

157388609 is a wasteful number, since it uses less digits than its factorization.

157388609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309 (or 2286 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 157388609 is about 12545.4616893919. The cubic root of 157388609 is about 539.9138054010.

The spelling of 157388609 in words is "one hundred fifty-seven million, three hundred eighty-eight thousand, six hundred nine".