641376434 has 4 divisors (see below), whose sum is σ = 962064654. Its totient is φ = 320688216.

The previous prime is 641376427. The next prime is 641376443. The reversal of 641376434 is 434673146.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 625750225 + 15626209 = 25015^2 + 3953^2 .

It is a super-2 number, since 2×641376434² = 822727460181112712, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 160344107 + ... + 160344110.

Almost surely, 2^641376434 is an apocalyptic number.

641376434 is a deficient number, since it is larger than the sum of its proper divisors (320688220).

641376434 is a wasteful number, since it uses less digits than its factorization.

641376434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320688219.

The product of its digits is 145152, while the sum is 38.

The square root of 641376434 is about 25325.4108357594. The cubic root of 641376434 is about 862.3912330532.

The spelling of 641376434 in words is "six hundred forty-one million, three hundred seventy-six thousand, four hundred thirty-four".