77190923 has 2 divisors, whose sum is σ = 77190924. Its totient is φ = 77190922.

The previous prime is 77190887. The next prime is 77190937. The reversal of 77190923 is 32909177.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77190923 - 2¹⁰ = 77189899 is a prime.

It is not a weakly prime, because it can be changed into another prime (77190943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38595461 + 38595462.

It is an arithmetic number, because the mean of its divisors is an integer number (38595462).

Almost surely, 2^77190923 is an apocalyptic number.

77190923 is a deficient number, since it is larger than the sum of its proper divisors (1).

77190923 is an equidigital number, since it uses as much as digits as its factorization.

77190923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 77190923 is about 8785.8364997307. The cubic root of 77190923 is about 425.7834186750.

The spelling of 77190923 in words is "seventy-seven million, one hundred ninety thousand, nine hundred twenty-three".