77361157 has 2 divisors, whose sum is σ = 77361158. Its totient is φ = 77361156.

The previous prime is 77361149. The next prime is 77361181. The reversal of 77361157 is 75116377.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73256481 + 4104676 = 8559^2 + 2026^2 .

It is a cyclic number.

It is not a de Polignac number, because 77361157 - 2³ = 77361149 is a prime.

It is a super-2 number, since 2×77361157² = 11969497224757298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77361197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38680578 + 38680579.

It is an arithmetic number, because the mean of its divisors is an integer number (38680579).

Almost surely, 2^77361157 is an apocalyptic number.

It is an amenable number.

77361157 is a deficient number, since it is larger than the sum of its proper divisors (1).

77361157 is an equidigital number, since it uses as much as digits as its factorization.

77361157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30870, while the sum is 37.

The square root of 77361157 is about 8795.5191432911. The cubic root of 77361157 is about 426.0961911843.

The spelling of 77361157 in words is "seventy-seven million, three hundred sixty-one thousand, one hundred fifty-seven".