172755493 has 4 divisors (see below), whose sum is σ = 174016620. Its totient is φ = 171494368.

The previous prime is 172755491. The next prime is 172755511. The reversal of 172755493 is 394557271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 394557271 = 6949 ⋅56779.

It can be written as a sum of positive squares in 2 ways, for example, as 106853569 + 65901924 = 10337^2 + 8118^2 .

It is a cyclic number.

It is not a de Polignac number, because 172755493 - 2¹ = 172755491 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 (172755491) 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, 630358 + ... + 630631.

It is an arithmetic number, because the mean of its divisors is an integer number (43504155).

Almost surely, 2^172755493 is an apocalyptic number.

It is an amenable number.

172755493 is a deficient number, since it is larger than the sum of its proper divisors (1261127).

172755493 is a wasteful number, since it uses less digits than its factorization.

172755493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261126.

The product of its digits is 264600, while the sum is 43.

The square root of 172755493 is about 13143.6483900019. The cubic root of 172755493 is about 556.9428357435.

The spelling of 172755493 in words is "one hundred seventy-two million, seven hundred fifty-five thousand, four hundred ninety-three".