172036493 has 4 divisors (see below), whose sum is σ = 172106688. Its totient is φ = 171966300.

The previous prime is 172036477. The next prime is 172036519. The reversal of 172036493 is 394630271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172036493 - 2⁴ = 172036477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172036093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31283 + ... + 36368.

It is an arithmetic number, because the mean of its divisors is an integer number (43026672).

Almost surely, 2^172036493 is an apocalyptic number.

It is an amenable number.

172036493 is a deficient number, since it is larger than the sum of its proper divisors (70195).

172036493 is an equidigital number, since it uses as much as digits as its factorization.

172036493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70194.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 172036493 is about 13116.2682573970. The cubic root of 172036493 is about 556.1691049637.

The spelling of 172036493 in words is "one hundred seventy-two million, thirty-six thousand, four hundred ninety-three".