641793479 has 2 divisors, whose sum is σ = 641793480. Its totient is φ = 641793478.

The previous prime is 641793463. The next prime is 641793487. The reversal of 641793479 is 974397146.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641793479 - 2⁴ = 641793463 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 (641793499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320896739 + 320896740.

It is an arithmetic number, because the mean of its divisors is an integer number (320896740).

Almost surely, 2^641793479 is an apocalyptic number.

641793479 is a deficient number, since it is larger than the sum of its proper divisors (1).

641793479 is an equidigital number, since it uses as much as digits as its factorization.

641793479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 50.

The square root of 641793479 is about 25333.6432239818. The cubic root of 641793479 is about 862.5781113602.

The spelling of 641793479 in words is "six hundred forty-one million, seven hundred ninety-three thousand, four hundred seventy-nine".