681403954 has 64 divisors (see below), whose sum is σ = 1349913600. Its totient is φ = 249912000.

The previous prime is 681403949. The next prime is 681403991. The reversal of 681403954 is 459304186.

It is a super-2 number, since 2×681403954² = 928622697053668232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 523104 + ... + 524404.

It is an arithmetic number, because the mean of its divisors is an integer number (21092400).

Almost surely, 2^681403954 is an apocalyptic number.

681403954 is a deficient number, since it is larger than the sum of its proper divisors (668509646).

681403954 is a wasteful number, since it uses less digits than its factorization.

681403954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 681403954 is about 26103.7153294316. The cubic root of 681403954 is about 879.9707092523.

The spelling of 681403954 in words is "six hundred eighty-one million, four hundred three thousand, nine hundred fifty-four".