77230157 has 2 divisors, whose sum is σ = 77230158. Its totient is φ = 77230156.

The previous prime is 77230147. The next prime is 77230217. The reversal of 77230157 is 75103277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75707401 + 1522756 = 8701^2 + 1234^2 .

It is an emirp because it is prime and its reverse (75103277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77230157 - 2²⁴ = 60452941 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 (77230147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38615078 + 38615079.

It is an arithmetic number, because the mean of its divisors is an integer number (38615079).

Almost surely, 2^77230157 is an apocalyptic number.

It is an amenable number.

77230157 is a deficient number, since it is larger than the sum of its proper divisors (1).

77230157 is an equidigital number, since it uses as much as digits as its factorization.

77230157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 77230157 is about 8788.0690142943. The cubic root of 77230157 is about 425.8555444144.

The spelling of 77230157 in words is "seventy-seven million, two hundred thirty thousand, one hundred fifty-seven".