768526621 has 2 divisors, whose sum is σ = 768526622. Its totient is φ = 768526620.

The previous prime is 768526613. The next prime is 768526637. The reversal of 768526621 is 126625867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 583947225 + 184579396 = 24165^2 + 13586^2 .

It is a cyclic number.

It is not a de Polignac number, because 768526621 - 2³ = 768526613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (768226621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384263310 + 384263311.

It is an arithmetic number, because the mean of its divisors is an integer number (384263311).

Almost surely, 2^768526621 is an apocalyptic number.

It is an amenable number.

768526621 is a deficient number, since it is larger than the sum of its proper divisors (1).

768526621 is an equidigital number, since it uses as much as digits as its factorization.

768526621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 768526621 is about 27722.3126921258. The cubic root of 768526621 is about 915.9806623842.

The spelling of 768526621 in words is "seven hundred sixty-eight million, five hundred twenty-six thousand, six hundred twenty-one".