764248421 has 2 divisors, whose sum is σ = 764248422. Its totient is φ = 764248420.

The previous prime is 764248403. The next prime is 764248451. The reversal of 764248421 is 124842467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 709636321 + 54612100 = 26639^2 + 7390^2 .

It is an emirp because it is prime and its reverse (124842467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 764248421 - 2¹⁰ = 764247397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764248451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382124210 + 382124211.

It is an arithmetic number, because the mean of its divisors is an integer number (382124211).

Almost surely, 2^764248421 is an apocalyptic number.

It is an amenable number.

764248421 is a deficient number, since it is larger than the sum of its proper divisors (1).

764248421 is an equidigital number, since it uses as much as digits as its factorization.

764248421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 38.

The square root of 764248421 is about 27645.0433351080. The cubic root of 764248421 is about 914.2778184807.

The spelling of 764248421 in words is "seven hundred sixty-four million, two hundred forty-eight thousand, four hundred twenty-one".