641434951 has 4 divisors (see below), whose sum is σ = 641493504. Its totient is φ = 641376400.

The previous prime is 641434943. The next prime is 641434979. The reversal of 641434951 is 159434146.

641434951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 159434146 = 2 ⋅79717073.

It is a cyclic number.

It is not a de Polignac number, because 641434951 - 2³ = 641434943 is a prime.

It is a super-2 number, since 2×641434951² = 822877592728744802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641434951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641414951) 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, 7390 + ... + 36571.

It is an arithmetic number, because the mean of its divisors is an integer number (160373376).

Almost surely, 2^641434951 is an apocalyptic number.

641434951 is a deficient number, since it is larger than the sum of its proper divisors (58553).

641434951 is a wasteful number, since it uses less digits than its factorization.

641434951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58552.

The product of its digits is 51840, while the sum is 37.

The square root of 641434951 is about 25326.5661114964. The cubic root of 641434951 is about 862.4174594680.

The spelling of 641434951 in words is "six hundred forty-one million, four hundred thirty-four thousand, nine hundred fifty-one".