157902191 has 2 divisors, whose sum is σ = 157902192. Its totient is φ = 157902190.

The previous prime is 157902161. The next prime is 157902203. The reversal of 157902191 is 191209751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157902191 - 2¹⁰ = 157901167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157902131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78951095 + 78951096.

It is an arithmetic number, because the mean of its divisors is an integer number (78951096).

Almost surely, 2^157902191 is an apocalyptic number.

157902191 is a deficient number, since it is larger than the sum of its proper divisors (1).

157902191 is an equidigital number, since it uses as much as digits as its factorization.

157902191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 35.

The square root of 157902191 is about 12565.9138545511. The cubic root of 157902191 is about 540.5004402847.

The spelling of 157902191 in words is "one hundred fifty-seven million, nine hundred two thousand, one hundred ninety-one".