76389977 has 2 divisors, whose sum is σ = 76389978. Its totient is φ = 76389976.

The previous prime is 76389961. The next prime is 76389991. The reversal of 76389977 is 77998367.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75411856 + 978121 = 8684^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 76389977 - 2⁴ = 76389961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76389917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38194988 + 38194989.

It is an arithmetic number, because the mean of its divisors is an integer number (38194989).

Almost surely, 2^76389977 is an apocalyptic number.

It is an amenable number.

76389977 is a deficient number, since it is larger than the sum of its proper divisors (1).

76389977 is an equidigital number, since it uses as much as digits as its factorization.

76389977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000752, while the sum is 56.

The square root of 76389977 is about 8740.1359829238. The cubic root of 76389977 is about 424.3056287737.

The spelling of 76389977 in words is "seventy-six million, three hundred eighty-nine thousand, nine hundred seventy-seven".