77976823 has 2 divisors, whose sum is σ = 77976824. Its totient is φ = 77976822.

The previous prime is 77976803. The next prime is 77976869. The reversal of 77976823 is 32867977.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77976823 - 2¹⁷ = 77845751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77976803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38988411 + 38988412.

It is an arithmetic number, because the mean of its divisors is an integer number (38988412).

Almost surely, 2^77976823 is an apocalyptic number.

77976823 is a deficient number, since it is larger than the sum of its proper divisors (1).

77976823 is an equidigital number, since it uses as much as digits as its factorization.

77976823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 49.

The square root of 77976823 is about 8830.4486295997. The cubic root of 77976823 is about 427.2235445714.

The spelling of 77976823 in words is "seventy-seven million, nine hundred seventy-six thousand, eight hundred twenty-three".