472978157 has 2 divisors, whose sum is σ = 472978158. Its totient is φ = 472978156.

The previous prime is 472978123. The next prime is 472978171. The reversal of 472978157 is 751879274.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281266441 + 191711716 = 16771^2 + 13846^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-472978157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (472978057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236489078 + 236489079.

It is an arithmetic number, because the mean of its divisors is an integer number (236489079).

Almost surely, 2^472978157 is an apocalyptic number.

It is an amenable number.

472978157 is a deficient number, since it is larger than the sum of its proper divisors (1).

472978157 is an equidigital number, since it uses as much as digits as its factorization.

472978157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 50.

The square root of 472978157 is about 21748.0609940289. The cubic root of 472978157 is about 779.1367597597.

The spelling of 472978157 in words is "four hundred seventy-two million, nine hundred seventy-eight thousand, one hundred fifty-seven".