172098459 has 16 divisors (see below), whose sum is σ = 274573600. Its totient is φ = 105906528.

The previous prime is 172098439. The next prime is 172098481. The reversal of 172098459 is 954890271.

It is not a de Polignac number, because 172098459 - 2⁸ = 172098203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172098439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244804 + ... + 245505.

It is an arithmetic number, because the mean of its divisors is an integer number (17160850).

Almost surely, 2^172098459 is an apocalyptic number.

172098459 is a deficient number, since it is larger than the sum of its proper divisors (102475141).

172098459 is a wasteful number, since it uses less digits than its factorization.

172098459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490331 (or 490325 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 172098459 is about 13118.6302257515. The cubic root of 172098459 is about 556.2358726539.

The spelling of 172098459 in words is "one hundred seventy-two million, ninety-eight thousand, four hundred fifty-nine".