921173457 has 8 divisors (see below), whose sum is σ = 1228602784. Its totient is φ = 613929888.

The previous prime is 921173399. The next prime is 921173459. The reversal of 921173457 is 754371129.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 921173457 - 2¹⁰ = 921172433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921173459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34423 + ... + 55020.

It is an arithmetic number, because the mean of its divisors is an integer number (153575348).

Almost surely, 2^921173457 is an apocalyptic number.

It is an amenable number.

921173457 is a deficient number, since it is larger than the sum of its proper divisors (307429327).

921173457 is a wasteful number, since it uses less digits than its factorization.

921173457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92879.

The product of its digits is 52920, while the sum is 39.

The square root of 921173457 is about 30350.8394776817. The cubic root of 921173457 is about 973.0021618247.

The spelling of 921173457 in words is "nine hundred twenty-one million, one hundred seventy-three thousand, four hundred fifty-seven".