840500523 has 16 divisors (see below), whose sum is σ = 1299325440. Its totient is φ = 535970952.

The previous prime is 840500509. The next prime is 840500527. The reversal of 840500523 is 325005048.

It is not a de Polignac number, because 840500523 - 2⁵ = 840500491 is a prime.

It is a super-2 number, since 2×840500523² = 1412882258326547058, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (840500527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676111 + ... + 677352.

It is an arithmetic number, because the mean of its divisors is an integer number (81207840).

Almost surely, 2^840500523 is an apocalyptic number.

840500523 is a deficient number, since it is larger than the sum of its proper divisors (458824917).

840500523 is a wasteful number, since it uses less digits than its factorization.

840500523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353495 (or 1353489 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 840500523 is about 28991.3870485701. The cubic root of 840500523 is about 943.7261647533.

The spelling of 840500523 in words is "eight hundred forty million, five hundred thousand, five hundred twenty-three".