631419947 has 8 divisors (see below), whose sum is σ = 648129600. Its totient is φ = 614910664.

The previous prime is 631419923. The next prime is 631419961. The reversal of 631419947 is 749914136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631419947 - 2⁶ = 631419883 is a prime.

It is a super-2 number, since 2×631419947² = 797382298938965618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631419898 and 631419907.

It is not an unprimeable number, because it can be changed into a prime (631419917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43697 + ... + 56322.

It is an arithmetic number, because the mean of its divisors is an integer number (81016200).

Almost surely, 2^631419947 is an apocalyptic number.

631419947 is a deficient number, since it is larger than the sum of its proper divisors (16709653).

631419947 is a wasteful number, since it uses less digits than its factorization.

631419947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100185.

The product of its digits is 163296, while the sum is 44.

The square root of 631419947 is about 25128.0708969073. The cubic root of 631419947 is about 857.9054612811.

The spelling of 631419947 in words is "six hundred thirty-one million, four hundred nineteen thousand, nine hundred forty-seven".