70992157 has 2 divisors, whose sum is σ = 70992158. Its totient is φ = 70992156.

The previous prime is 70992109. The next prime is 70992169. The reversal of 70992157 is 75129907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49406841 + 21585316 = 7029^2 + 4646^2 .

It is an emirp because it is prime and its reverse (75129907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70992157 - 2²³ = 62603549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70995157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35496078 + 35496079.

It is an arithmetic number, because the mean of its divisors is an integer number (35496079).

Almost surely, 2^70992157 is an apocalyptic number.

It is an amenable number.

70992157 is a deficient number, since it is larger than the sum of its proper divisors (1).

70992157 is an equidigital number, since it uses as much as digits as its factorization.

70992157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 70992157 is about 8425.6843638959. The cubic root of 70992157 is about 414.0665272289.

The spelling of 70992157 in words is "seventy million, nine hundred ninety-two thousand, one hundred fifty-seven".