172340493 has 32 divisors (see below), whose sum is σ = 254693376. Its totient is φ = 102994368.

The previous prime is 172340489. The next prime is 172340503. The reversal of 172340493 is 394043271.

It is not a de Polignac number, because 172340493 - 2² = 172340489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172340473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 305830 + ... + 306392.

It is an arithmetic number, because the mean of its divisors is an integer number (7959168).

Almost surely, 2^172340493 is an apocalyptic number.

172340493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

172340493 is a deficient number, since it is larger than the sum of its proper divisors (82352883).

172340493 is a wasteful number, since it uses less digits than its factorization.

172340493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 172340493 is about 13127.8518044652. The cubic root of 172340493 is about 556.4965082052.

The spelling of 172340493 in words is "one hundred seventy-two million, three hundred forty thousand, four hundred ninety-three".