172239082949 has 2 divisors, whose sum is σ = 172239082950. Its totient is φ = 172239082948.

The previous prime is 172239082931. The next prime is 172239082973. The reversal of 172239082949 is 949280932271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121650976225 + 50588106724 = 348785^2 + 224918^2 .

It is a cyclic number.

It is not a de Polignac number, because 172239082949 - 2¹² = 172239078853 is a prime.

It is a super-2 number, since 2×172239082949² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172239082894 and 172239082903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172239082999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86119541474 + 86119541475.

It is an arithmetic number, because the mean of its divisors is an integer number (86119541475).

Almost surely, 2^172239082949 is an apocalyptic number.

It is an amenable number.

172239082949 is a deficient number, since it is larger than the sum of its proper divisors (1).

172239082949 is an equidigital number, since it uses as much as digits as its factorization.

172239082949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 172239082949 in words is "one hundred seventy-two billion, two hundred thirty-nine million, eighty-two thousand, nine hundred forty-nine".