641402393 has 4 divisors (see below), whose sum is σ = 652273680. Its totient is φ = 630531108.

The previous prime is 641402387. The next prime is 641402429. The reversal of 641402393 is 393204146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641402393 - 2⁶ = 641402329 is a prime.

It is a super-2 number, since 2×641402393² = 822794059492252898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641402693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5435555 + ... + 5435672.

It is an arithmetic number, because the mean of its divisors is an integer number (163068420).

Almost surely, 2^641402393 is an apocalyptic number.

It is an amenable number.

641402393 is a deficient number, since it is larger than the sum of its proper divisors (10871287).

641402393 is a wasteful number, since it uses less digits than its factorization.

641402393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10871286.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 641402393 is about 25325.9233395349. The cubic root of 641402393 is about 862.4028676726.

The spelling of 641402393 in words is "six hundred forty-one million, four hundred two thousand, three hundred ninety-three".