172794457 has 4 divisors (see below), whose sum is σ = 188503056. Its totient is φ = 157085860.

The previous prime is 172794451. The next prime is 172794473. The reversal of 172794457 is 754497271.

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 172794457 - 2²³ = 164405849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172794451) 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, 7854283 + ... + 7854304.

It is an arithmetic number, because the mean of its divisors is an integer number (47125764).

Almost surely, 2^172794457 is an apocalyptic number.

It is an amenable number.

172794457 is a deficient number, since it is larger than the sum of its proper divisors (15708599).

172794457 is a wasteful number, since it uses less digits than its factorization.

172794457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15708598.

The product of its digits is 493920, while the sum is 46.

The square root of 172794457 is about 13145.1305432848. The cubic root of 172794457 is about 556.9847043386.

It can be divided in two parts, 17279 and 4457, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 172794457 in words is "one hundred seventy-two million, seven hundred ninety-four thousand, four hundred fifty-seven".