634747399 has 16 divisors (see below), whose sum is σ = 778143744. Its totient is φ = 509493600.

The previous prime is 634747387. The next prime is 634747493. The reversal of 634747399 is 993747436.

It is not a de Polignac number, because 634747399 - 2¹³ = 634739207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634747499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93207 + ... + 99784.

It is an arithmetic number, because the mean of its divisors is an integer number (48633984).

Almost surely, 2^634747399 is an apocalyptic number.

634747399 is a deficient number, since it is larger than the sum of its proper divisors (143396345).

634747399 is a wasteful number, since it uses less digits than its factorization.

634747399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193038.

The product of its digits is 3429216, while the sum is 52.

The square root of 634747399 is about 25194.1937557049. The cubic root of 634747399 is about 859.4098163640.

The spelling of 634747399 in words is "six hundred thirty-four million, seven hundred forty-seven thousand, three hundred ninety-nine".