70713157 has 2 divisors, whose sum is σ = 70713158. Its totient is φ = 70713156.

The previous prime is 70713143. The next prime is 70713161. The reversal of 70713157 is 75131707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39955041 + 30758116 = 6321^2 + 5546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70713157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70713127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35356578 + 35356579.

It is an arithmetic number, because the mean of its divisors is an integer number (35356579).

Almost surely, 2^70713157 is an apocalyptic number.

It is an amenable number.

70713157 is a deficient number, since it is larger than the sum of its proper divisors (1).

70713157 is an equidigital number, since it uses as much as digits as its factorization.

70713157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5145, while the sum is 31.

The square root of 70713157 is about 8409.1115464120. Note that the first 3 decimals coincide. The cubic root of 70713157 is about 413.5233863389.

The spelling of 70713157 in words is "seventy million, seven hundred thirteen thousand, one hundred fifty-seven".