470721157 has 2 divisors, whose sum is σ = 470721158. Its totient is φ = 470721156.

The previous prime is 470721149. The next prime is 470721161. The reversal of 470721157 is 751127074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292204836 + 178516321 = 17094^2 + 13361^2 .

It is a cyclic number.

It is not a de Polignac number, because 470721157 - 2³ = 470721149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (470751157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235360578 + 235360579.

It is an arithmetic number, because the mean of its divisors is an integer number (235360579).

Almost surely, 2^470721157 is an apocalyptic number.

It is an amenable number.

470721157 is a deficient number, since it is larger than the sum of its proper divisors (1).

470721157 is an equidigital number, since it uses as much as digits as its factorization.

470721157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13720, while the sum is 34.

The square root of 470721157 is about 21696.1092594963. The cubic root of 470721157 is about 777.8954647714.

The spelling of 470721157 in words is "four hundred seventy million, seven hundred twenty-one thousand, one hundred fifty-seven".