765144997 has 2 divisors, whose sum is σ = 765144998. Its totient is φ = 765144996.

The previous prime is 765144977. The next prime is 765145009. The reversal of 765144997 is 799441567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632572801 + 132572196 = 25151^2 + 11514^2 .

It is a cyclic number.

It is not a de Polignac number, because 765144997 - 2¹¹ = 765142949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (765144917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382572498 + 382572499.

It is an arithmetic number, because the mean of its divisors is an integer number (382572499).

Almost surely, 2^765144997 is an apocalyptic number.

It is an amenable number.

765144997 is a deficient number, since it is larger than the sum of its proper divisors (1).

765144997 is an equidigital number, since it uses as much as digits as its factorization.

765144997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The square root of 765144997 is about 27661.2544364857. The cubic root of 765144997 is about 914.6352062903.

The spelling of 765144997 in words is "seven hundred sixty-five million, one hundred forty-four thousand, nine hundred ninety-seven".