517872091 has 32 divisors (see below), whose sum is σ = 600956928. Its totient is φ = 441987840.

The previous prime is 517872079. The next prime is 517872101. The reversal of 517872091 is 190278715.

It is a cyclic number.

It is not a de Polignac number, because 517872091 - 2⁵ = 517872059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (517872191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2222511 + ... + 2222743.

It is an arithmetic number, because the mean of its divisors is an integer number (18779904).

Almost surely, 2^517872091 is an apocalyptic number.

517872091 is a deficient number, since it is larger than the sum of its proper divisors (83084837).

517872091 is a wasteful number, since it uses less digits than its factorization.

517872091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 517872091 is about 22756.8031805876. The cubic root of 517872091 is about 803.0467625462.

The spelling of 517872091 in words is "five hundred seventeen million, eight hundred seventy-two thousand, ninety-one".