172098439 has 2 divisors, whose sum is σ = 172098440. Its totient is φ = 172098438.

The previous prime is 172098379. The next prime is 172098481. The reversal of 172098439 is 934890271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172098439 - 2²¹ = 170001287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172098395 and 172098404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172098539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86049219 + 86049220.

It is an arithmetic number, because the mean of its divisors is an integer number (86049220).

Almost surely, 2^172098439 is an apocalyptic number.

172098439 is a deficient number, since it is larger than the sum of its proper divisors (1).

172098439 is an equidigital number, since it uses as much as digits as its factorization.

172098439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 172098439 is about 13118.6294634767. The cubic root of 172098439 is about 556.2358511067.

The spelling of 172098439 in words is "one hundred seventy-two million, ninety-eight thousand, four hundred thirty-nine".