172243518983 has 2 divisors, whose sum is σ = 172243518984. Its totient is φ = 172243518982.

The previous prime is 172243518919. The next prime is 172243518989. The reversal of 172243518983 is 389815342271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172243518983 - 2⁶ = 172243518919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172243518989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86121759491 + 86121759492.

It is an arithmetic number, because the mean of its divisors is an integer number (86121759492).

Almost surely, 2^172243518983 is an apocalyptic number.

172243518983 is a deficient number, since it is larger than the sum of its proper divisors (1).

172243518983 is an equidigital number, since it uses as much as digits as its factorization.

172243518983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The spelling of 172243518983 in words is "one hundred seventy-two billion, two hundred forty-three million, five hundred eighteen thousand, nine hundred eighty-three".