172440053 has 4 divisors (see below), whose sum is σ = 174517728. Its totient is φ = 170362380.

The previous prime is 172440049. The next prime is 172440113. The reversal of 172440053 is 350044271.

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 172440053 - 2² = 172440049 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172440013) 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, 1038713 + ... + 1038878.

It is an arithmetic number, because the mean of its divisors is an integer number (43629432).

Almost surely, 2^172440053 is an apocalyptic number.

It is an amenable number.

172440053 is a deficient number, since it is larger than the sum of its proper divisors (2077675).

172440053 is an equidigital number, since it uses as much as digits as its factorization.

172440053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077674.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 172440053 is about 13131.6431949699. The cubic root of 172440053 is about 556.6036490669.

The spelling of 172440053 in words is "one hundred seventy-two million, four hundred forty thousand, fifty-three".