77795251 has 2 divisors, whose sum is σ = 77795252. Its totient is φ = 77795250.

The previous prime is 77795239. The next prime is 77795257. The reversal of 77795251 is 15259777.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77795251 - 2⁵ = 77795219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77795198 and 77795207.

It is not a weakly prime, because it can be changed into another prime (77795257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38897625 + 38897626.

It is an arithmetic number, because the mean of its divisors is an integer number (38897626).

Almost surely, 2^77795251 is an apocalyptic number.

77795251 is a deficient number, since it is larger than the sum of its proper divisors (1).

77795251 is an equidigital number, since it uses as much as digits as its factorization.

77795251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 154350, while the sum is 43.

The square root of 77795251 is about 8820.1616198344. The cubic root of 77795251 is about 426.8916847609.

The spelling of 77795251 in words is "seventy-seven million, seven hundred ninety-five thousand, two hundred fifty-one".