157308973 has 12 divisors (see below), whose sum is σ = 172126620. Its totient is φ = 143264640.

The previous prime is 157308971. The next prime is 157308989. The reversal of 157308973 is 379803751.

It can be written as a sum of positive squares in 2 ways, for example, as 143928009 + 13380964 = 11997^2 + 3658^2 .

It is not a de Polignac number, because 157308973 - 2¹ = 157308971 is a prime.

It is a super-2 number, since 2×157308973² = 49492225972629458, which contains 22 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 (157308971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11523 + ... + 21151.

It is an arithmetic number, because the mean of its divisors is an integer number (14343885).

Almost surely, 2^157308973 is an apocalyptic number.

It is an amenable number.

157308973 is a deficient number, since it is larger than the sum of its proper divisors (14817647).

157308973 is an equidigital number, since it uses as much as digits as its factorization.

157308973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9708 (or 9677 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 157308973 is about 12542.2873910623. The cubic root of 157308973 is about 539.8227275906.

The spelling of 157308973 in words is "one hundred fifty-seven million, three hundred eight thousand, nine hundred seventy-three".