156157193 has 2 divisors, whose sum is σ = 156157194. Its totient is φ = 156157192.

The previous prime is 156157153. The next prime is 156157201. The reversal of 156157193 is 391751651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119530489 + 36626704 = 10933^2 + 6052^2 .

It is an emirp because it is prime and its reverse (391751651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 156157193 - 2⁸ = 156156937 is a prime.

It is not a weakly prime, because it can be changed into another prime (156157153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78078596 + 78078597.

It is an arithmetic number, because the mean of its divisors is an integer number (78078597).

Almost surely, 2^156157193 is an apocalyptic number.

It is an amenable number.

156157193 is a deficient number, since it is larger than the sum of its proper divisors (1).

156157193 is an equidigital number, since it uses as much as digits as its factorization.

156157193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 38.

The square root of 156157193 is about 12496.2871685953. The cubic root of 156157193 is about 538.5020131904.

The spelling of 156157193 in words is "one hundred fifty-six million, one hundred fifty-seven thousand, one hundred ninety-three".