633431997 has 12 divisors (see below), whose sum is σ = 998135424. Its totient is φ = 383898120.

The previous prime is 633431993. The next prime is 633432047. The reversal of 633431997 is 799134336.

It is a happy number.

633431997 is a `hidden beast` number, since 633 + 4 + 3 + 1 + 9 + 9 + 7 = 666.

It is not a de Polignac number, because 633431997 - 2² = 633431993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633431993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3199053 + ... + 3199250.

It is an arithmetic number, because the mean of its divisors is an integer number (83177952).

Almost surely, 2^633431997 is an apocalyptic number.

It is an amenable number.

633431997 is a deficient number, since it is larger than the sum of its proper divisors (364703427).

633431997 is a wasteful number, since it uses less digits than its factorization.

633431997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6398320 (or 6398317 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 633431997 is about 25168.0749561821. The cubic root of 633431997 is about 858.8157473990.

The spelling of 633431997 in words is "six hundred thirty-three million, four hundred thirty-one thousand, nine hundred ninety-seven".