157738457 has 2 divisors, whose sum is σ = 157738458. Its totient is φ = 157738456.

The previous prime is 157738421. The next prime is 157738487. The reversal of 157738457 is 754837751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156475081 + 1263376 = 12509^2 + 1124^2 .

It is a cyclic number.

It is not a de Polignac number, because 157738457 - 2¹² = 157734361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157738487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78869228 + 78869229.

It is an arithmetic number, because the mean of its divisors is an integer number (78869229).

Almost surely, 2^157738457 is an apocalyptic number.

It is an amenable number.

157738457 is a deficient number, since it is larger than the sum of its proper divisors (1).

157738457 is an equidigital number, since it uses as much as digits as its factorization.

157738457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 823200, while the sum is 47.

The square root of 157738457 is about 12559.3971590996. The cubic root of 157738457 is about 540.3135547512.

The spelling of 157738457 in words is "one hundred fifty-seven million, seven hundred thirty-eight thousand, four hundred fifty-seven".