631622929 has 16 divisors (see below), whose sum is σ = 748396800. Its totient is φ = 521567424.

The previous prime is 631622921. The next prime is 631622963. The reversal of 631622929 is 929226136.

It is not a de Polignac number, because 631622929 - 2³ = 631622921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631622891 and 631622900.

It is not an unprimeable number, because it can be changed into a prime (631622921) 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, 95667 + ... + 102055.

It is an arithmetic number, because the mean of its divisors is an integer number (46774800).

Almost surely, 2^631622929 is an apocalyptic number.

It is an amenable number.

631622929 is a deficient number, since it is larger than the sum of its proper divisors (116773871).

631622929 is a wasteful number, since it uses less digits than its factorization.

631622929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6912.

The product of its digits is 69984, while the sum is 40.

The square root of 631622929 is about 25132.1095214867. The cubic root of 631622929 is about 857.9973814632.

The spelling of 631622929 in words is "six hundred thirty-one million, six hundred twenty-two thousand, nine hundred twenty-nine".