157102609 has 2 divisors, whose sum is σ = 157102610. Its totient is φ = 157102608.

The previous prime is 157102597. The next prime is 157102619. The reversal of 157102609 is 906201751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81360400 + 75742209 = 9020^2 + 8703^2 .

It is a cyclic number.

It is not a de Polignac number, because 157102609 - 2¹⁷ = 156971537 is a prime.

It is a super-3 number, since 3×157102609³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (157102619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78551304 + 78551305.

It is an arithmetic number, because the mean of its divisors is an integer number (78551305).

Almost surely, 2^157102609 is an apocalyptic number.

It is an amenable number.

157102609 is a deficient number, since it is larger than the sum of its proper divisors (1).

157102609 is an equidigital number, since it uses as much as digits as its factorization.

157102609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 157102609 is about 12534.0579622084. The cubic root of 157102609 is about 539.5865708440.

The spelling of 157102609 in words is "one hundred fifty-seven million, one hundred two thousand, six hundred nine".