745808977 has 2 divisors, whose sum is σ = 745808978. Its totient is φ = 745808976.

The previous prime is 745808933. The next prime is 745809007. The reversal of 745808977 is 779808547.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 439698961 + 306110016 = 20969^2 + 17496^2 .

It is a cyclic number.

It is not a de Polignac number, because 745808977 - 2²⁷ = 611591249 is a prime.

It is not a weakly prime, because it can be changed into another prime (745806977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372904488 + 372904489.

It is an arithmetic number, because the mean of its divisors is an integer number (372904489).

Almost surely, 2^745808977 is an apocalyptic number.

It is an amenable number.

745808977 is a deficient number, since it is larger than the sum of its proper divisors (1).

745808977 is an equidigital number, since it uses as much as digits as its factorization.

745808977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3951360, while the sum is 55.

The square root of 745808977 is about 27309.5034191396. The cubic root of 745808977 is about 906.8647800178.

The spelling of 745808977 in words is "seven hundred forty-five million, eight hundred eight thousand, nine hundred seventy-seven".