764101021 has 2 divisors, whose sum is σ = 764101022. Its totient is φ = 764101020.

The previous prime is 764101007. The next prime is 764101027. The reversal of 764101021 is 120101467.

764101021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437395396 + 326705625 = 20914^2 + 18075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-764101021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 764100983 and 764101001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764101027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382050510 + 382050511.

It is an arithmetic number, because the mean of its divisors is an integer number (382050511).

Almost surely, 2^764101021 is an apocalyptic number.

It is an amenable number.

764101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

764101021 is an equidigital number, since it uses as much as digits as its factorization.

764101021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 764101021 is about 27642.3772675217. The cubic root of 764101021 is about 914.2190360169.

Adding to 764101021 its reverse (120101467), we get a palindrome (884202488).

The spelling of 764101021 in words is "seven hundred sixty-four million, one hundred one thousand, twenty-one".