77951 has 2 divisors, whose sum is σ = 77952. Its totient is φ = 77950.

The previous prime is 77933. The next prime is 77969. The reversal of 77951 is 15977.

It is a balanced prime because it is at equal distance from previous prime (77933) and next prime (77969).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77951 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 (77351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38975 + 38976.

It is an arithmetic number, because the mean of its divisors is an integer number (38976).

2⁷⁷⁹⁵¹ is an apocalyptic number.

77951 is a deficient number, since it is larger than the sum of its proper divisors (1).

77951 is an equidigital number, since it uses as much as digits as its factorization.

77951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2205, while the sum is 29.

The square root of 77951 is about 279.1970630218. The cubic root of 77951 is about 42.7176379225.

The spelling of 77951 in words is "seventy-seven thousand, nine hundred fifty-one".