172223983 has 2 divisors, whose sum is σ = 172223984. Its totient is φ = 172223982.

The previous prime is 172223981. The next prime is 172224001. The reversal of 172223983 is 389322271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172223983 - 2¹ = 172223981 is a prime.

It is a super-2 number, since 2×172223983² = 59322200640768578, which contains 22 as substring.

Together with 172223981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172223981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86111991 + 86111992.

It is an arithmetic number, because the mean of its divisors is an integer number (86111992).

Almost surely, 2^172223983 is an apocalyptic number.

172223983 is a deficient number, since it is larger than the sum of its proper divisors (1).

172223983 is an equidigital number, since it uses as much as digits as its factorization.

172223983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 172223983 is about 13123.4135422153. The cubic root of 172223983 is about 556.3710742971.

The spelling of 172223983 in words is "one hundred seventy-two million, two hundred twenty-three thousand, nine hundred eighty-three".