684959954 has 16 divisors (see below), whose sum is σ = 1243289088. Its totient is φ = 276286272.

The previous prime is 684959953. The next prime is 684959959. The reversal of 684959954 is 459959486.

It is a junction number, because it is equal to n+sod(n) for n = 684959893 and 684959902.

It is not an unprimeable number, because it can be changed into a prime (684959953) 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, 1438754 + ... + 1439229.

It is an arithmetic number, because the mean of its divisors is an integer number (77705568).

Almost surely, 2^684959954 is an apocalyptic number.

684959954 is a deficient number, since it is larger than the sum of its proper divisors (558329134).

684959954 is a wasteful number, since it uses less digits than its factorization.

684959954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878009.

The product of its digits is 13996800, while the sum is 59.

The square root of 684959954 is about 26171.7396059184. The cubic root of 684959954 is about 881.4988034204.

The spelling of 684959954 in words is "six hundred eighty-four million, nine hundred fifty-nine thousand, nine hundred fifty-four".