223231999979 has 2 divisors, whose sum is σ = 223231999980. Its totient is φ = 223231999978.

The previous prime is 223231999943. The next prime is 223232000003. The reversal of 223231999979 is 979999132322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223231999979 is a prime.

It is a super-3 number, since 3×223231999979³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (223231999919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111615999989 + 111615999990.

It is an arithmetic number, because the mean of its divisors is an integer number (111615999990).

Almost surely, 2^223231999979 is an apocalyptic number.

223231999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

223231999979 is an equidigital number, since it uses as much as digits as its factorization.

223231999979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29760696, while the sum is 65.

The spelling of 223231999979 in words is "two hundred twenty-three billion, two hundred thirty-one million, nine hundred ninety-nine thousand, nine hundred seventy-nine".