641342479 has 2 divisors, whose sum is σ = 641342480. Its totient is φ = 641342478.

The previous prime is 641342441. The next prime is 641342483. The reversal of 641342479 is 974243146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641342479 - 2¹⁷ = 641211407 is a prime.

It is a super-2 number, since 2×641342479² = 822640350739730882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641342489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320671239 + 320671240.

It is an arithmetic number, because the mean of its divisors is an integer number (320671240).

Almost surely, 2^641342479 is an apocalyptic number.

641342479 is a deficient number, since it is larger than the sum of its proper divisors (1).

641342479 is an equidigital number, since it uses as much as digits as its factorization.

641342479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The square root of 641342479 is about 25324.7404527667. The cubic root of 641342479 is about 862.3760142158.

The spelling of 641342479 in words is "six hundred forty-one million, three hundred forty-two thousand, four hundred seventy-nine".