172848991 has 8 divisors (see below), whose sum is σ = 197686944. Its totient is φ = 148047360.

The previous prime is 172848983. The next prime is 172848997. The reversal of 172848991 is 199848271.

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

It is a cyclic number.

It is not a de Polignac number, because 172848991 - 2³ = 172848983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172848997) 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, 2031 + ... + 18703.

It is an arithmetic number, because the mean of its divisors is an integer number (24710868).

Almost surely, 2^172848991 is an apocalyptic number.

172848991 is a deficient number, since it is larger than the sum of its proper divisors (24837953).

172848991 is a wasteful number, since it uses less digits than its factorization.

172848991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18161.

The product of its digits is 290304, while the sum is 49.

The square root of 172848991 is about 13147.2046838862. The cubic root of 172848991 is about 557.0432930409.

The spelling of 172848991 in words is "one hundred seventy-two million, eight hundred forty-eight thousand, nine hundred ninety-one".