641423317 has 4 divisors (see below), whose sum is σ = 642740896. Its totient is φ = 640105740.

The previous prime is 641423281. The next prime is 641423327. The reversal of 641423317 is 713324146.

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 641423317 - 2¹⁵ = 641390549 is a prime.

It is a super-2 number, since 2×641423317² = 822847743182564978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641423327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658059 + ... + 659032.

It is an arithmetic number, because the mean of its divisors is an integer number (160685224).

Almost surely, 2^641423317 is an apocalyptic number.

It is an amenable number.

641423317 is a deficient number, since it is larger than the sum of its proper divisors (1317579).

641423317 is a wasteful number, since it uses less digits than its factorization.

641423317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317578.

The product of its digits is 12096, while the sum is 31.

The square root of 641423317 is about 25326.3364306802. The cubic root of 641423317 is about 862.4122454161.

The spelling of 641423317 in words is "six hundred forty-one million, four hundred twenty-three thousand, three hundred seventeen".