77031223 has 2 divisors, whose sum is σ = 77031224. Its totient is φ = 77031222.

The previous prime is 77031197. The next prime is 77031257. The reversal of 77031223 is 32213077.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77031223 - 2²⁵ = 43476791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77031323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38515611 + 38515612.

It is an arithmetic number, because the mean of its divisors is an integer number (38515612).

Almost surely, 2^77031223 is an apocalyptic number.

77031223 is a deficient number, since it is larger than the sum of its proper divisors (1).

77031223 is an equidigital number, since it uses as much as digits as its factorization.

77031223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 77031223 is about 8776.7433026152. The cubic root of 77031223 is about 425.4895820570.

The spelling of 77031223 in words is "seventy-seven million, thirty-one thousand, two hundred twenty-three".