631970943 has 4 divisors (see below), whose sum is σ = 842627928. Its totient is φ = 421313960.

The previous prime is 631970909. The next prime is 631970981. The reversal of 631970943 is 349079136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 631970943 - 2⁶ = 631970879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631970895 and 631970904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631990943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105328488 + ... + 105328493.

It is an arithmetic number, because the mean of its divisors is an integer number (210656982).

Almost surely, 2^631970943 is an apocalyptic number.

631970943 is a deficient number, since it is larger than the sum of its proper divisors (210656985).

631970943 is a wasteful number, since it uses less digits than its factorization.

631970943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210656984.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 631970943 is about 25139.0322606102. The cubic root of 631970943 is about 858.1549334157.

The spelling of 631970943 in words is "six hundred thirty-one million, nine hundred seventy thousand, nine hundred forty-three".