765638201 has 2 divisors, whose sum is σ = 765638202. Its totient is φ = 765638200.

The previous prime is 765638189. The next prime is 765638239. The reversal of 765638201 is 102836567.

It is an a-pointer prime, because the next prime (765638239) can be obtained adding 765638201 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449652025 + 315986176 = 21205^2 + 17776^2 .

It is a cyclic number.

It is not a de Polignac number, because 765638201 - 2¹⁴ = 765621817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (765638261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382819100 + 382819101.

It is an arithmetic number, because the mean of its divisors is an integer number (382819101).

Almost surely, 2^765638201 is an apocalyptic number.

It is an amenable number.

765638201 is a deficient number, since it is larger than the sum of its proper divisors (1).

765638201 is an equidigital number, since it uses as much as digits as its factorization.

765638201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 765638201 is about 27670.1680696016. The cubic root of 765638201 is about 914.8316853253.

The spelling of 765638201 in words is "seven hundred sixty-five million, six hundred thirty-eight thousand, two hundred one".