634726445 has 18 divisors (see below), whose sum is σ = 805227498. Its totient is φ = 480244608.

The previous prime is 634726363. The next prime is 634726487. The reversal of 634726445 is 544627436.

It can be written as a sum of positive squares in 3 ways, for example, as 114019684 + 520706761 = 10678^2 + 22819^2 .

It is not a de Polignac number, because 634726445 - 2¹⁶ = 634660909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1070069 + ... + 1070661.

It is an arithmetic number, because the mean of its divisors is an integer number (44734861).

Almost surely, 2^634726445 is an apocalyptic number.

It is an amenable number.

634726445 is a deficient number, since it is larger than the sum of its proper divisors (170501053).

634726445 is an frugal number, since it uses more digits than its factorization.

634726445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 617 counting only the distinct ones).

The product of its digits is 483840, while the sum is 41.

The square root of 634726445 is about 25193.7779024901. Note that the first 3 decimals coincide. The cubic root of 634726445 is about 859.4003594412.

Subtracting from 634726445 its reverse (544627436), we obtain a palindrome (90099009).

The spelling of 634726445 in words is "six hundred thirty-four million, seven hundred twenty-six thousand, four hundred forty-five".