765545401 has 2 divisors, whose sum is σ = 765545402. Its totient is φ = 765545400.

The previous prime is 765545371. The next prime is 765545413. The reversal of 765545401 is 104545567.

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., 525326400 + 240219001 = 22920^2 + 15499^2 .

It is a cyclic number.

It is not a de Polignac number, because 765545401 - 2⁷ = 765545273 is a prime.

It is not a weakly prime, because it can be changed into another prime (765545101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382772700 + 382772701.

It is an arithmetic number, because the mean of its divisors is an integer number (382772701).

Almost surely, 2^765545401 is an apocalyptic number.

It is an amenable number.

765545401 is a deficient number, since it is larger than the sum of its proper divisors (1).

765545401 is an equidigital number, since it uses as much as digits as its factorization.

765545401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 765545401 is about 27668.4911225748. The cubic root of 765545401 is about 914.7947227797.

The spelling of 765545401 in words is "seven hundred sixty-five million, five hundred forty-five thousand, four hundred one".