77933897 has 2 divisors, whose sum is σ = 77933898. Its totient is φ = 77933896.

The previous prime is 77933893. The next prime is 77933927. The reversal of 77933897 is 79833977.

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., 70879561 + 7054336 = 8419^2 + 2656^2 .

It is a cyclic number.

It is not a de Polignac number, because 77933897 - 2² = 77933893 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77933893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38966948 + 38966949.

It is an arithmetic number, because the mean of its divisors is an integer number (38966949).

Almost surely, 2^77933897 is an apocalyptic number.

It is an amenable number.

77933897 is a deficient number, since it is larger than the sum of its proper divisors (1).

77933897 is an equidigital number, since it uses as much as digits as its factorization.

77933897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2000376, while the sum is 53.

The square root of 77933897 is about 8828.0177276668. The cubic root of 77933897 is about 427.1451351014.

It can be divided in two parts, 7793 and 3897, that multiplied together give a triangular number (30369321 = T₇₇₉₃).

The spelling of 77933897 in words is "seventy-seven million, nine hundred thirty-three thousand, eight hundred ninety-seven".