684374631 has 8 divisors (see below), whose sum is σ = 941935104. Its totient is φ = 441531960.

The previous prime is 684374629. The next prime is 684374633. The reversal of 684374631 is 136473486.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (684374629) and next prime (684374633).

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

It is not a de Polignac number, because 684374631 - 2¹ = 684374629 is a prime.

It is a super-2 number, since 2×684374631² = 936737271112772322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684374633) 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, 3679341 + ... + 3679526.

It is an arithmetic number, because the mean of its divisors is an integer number (117741888).

Almost surely, 2^684374631 is an apocalyptic number.

684374631 is a deficient number, since it is larger than the sum of its proper divisors (257560473).

684374631 is a wasteful number, since it uses less digits than its factorization.

684374631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7358901.

The product of its digits is 290304, while the sum is 42.

The square root of 684374631 is about 26160.5548679687. The cubic root of 684374631 is about 881.2476410178.

The spelling of 684374631 in words is "six hundred eighty-four million, three hundred seventy-four thousand, six hundred thirty-one".