631670378 has 4 divisors (see below), whose sum is σ = 947505570. Its totient is φ = 315835188.

The previous prime is 631670363. The next prime is 631670381. The reversal of 631670378 is 873076136.

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

It can be written as a sum of positive squares in only one way, i.e., 613206169 + 18464209 = 24763^2 + 4297^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157917593 + ... + 157917596.

Almost surely, 2^631670378 is an apocalyptic number.

631670378 is a deficient number, since it is larger than the sum of its proper divisors (315835192).

631670378 is a wasteful number, since it uses less digits than its factorization.

631670378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315835191.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 631670378 is about 25133.0534953475. The cubic root of 631670378 is about 858.0188658523.

The spelling of 631670378 in words is "six hundred thirty-one million, six hundred seventy thousand, three hundred seventy-eight".