631429945 has 16 divisors (see below), whose sum is σ = 798906240. Its totient is φ = 477771264.

The previous prime is 631429937. The next prime is 631429951. The reversal of 631429945 is 549924136.

It is not a de Polignac number, because 631429945 - 2³ = 631429937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56329 + ... + 66601.

It is an arithmetic number, because the mean of its divisors is an integer number (49931640).

Almost surely, 2^631429945 is an apocalyptic number.

It is an amenable number.

631429945 is a deficient number, since it is larger than the sum of its proper divisors (167476295).

631429945 is a wasteful number, since it uses less digits than its factorization.

631429945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10944.

The product of its digits is 233280, while the sum is 43.

The square root of 631429945 is about 25128.2698369784. The cubic root of 631429945 is about 857.9099893259.

The spelling of 631429945 in words is "six hundred thirty-one million, four hundred twenty-nine thousand, nine hundred forty-five".