223694961 has 16 divisors (see below), whose sum is σ = 358809600. Its totient is φ = 121097808.

The previous prime is 223694957. The next prime is 223694963. The reversal of 223694961 is 169496322.

It is not a de Polignac number, because 223694961 - 2² = 223694957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (223694963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279921 + ... + 280718.

It is an arithmetic number, because the mean of its divisors is an integer number (22425600).

Almost surely, 2^223694961 is an apocalyptic number.

223694961 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

223694961 is a deficient number, since it is larger than the sum of its proper divisors (135114639).

223694961 is a wasteful number, since it uses less digits than its factorization.

223694961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560668.

The product of its digits is 139968, while the sum is 42.

The square root of 223694961 is about 14956.4354376302. The cubic root of 223694961 is about 607.0419911476.

The spelling of 223694961 in words is "two hundred twenty-three million, six hundred ninety-four thousand, nine hundred sixty-one".