840124913 has 4 divisors (see below), whose sum is σ = 843640320. Its totient is φ = 836609508.

The previous prime is 840124903. The next prime is 840124931. The reversal of 840124913 is 319421048.

It is a happy number.

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 840124913 - 2¹⁸ = 839862769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 840124913.

It is not an unprimeable number, because it can be changed into a prime (840124903) 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, 1757345 + ... + 1757822.

It is an arithmetic number, because the mean of its divisors is an integer number (210910080).

Almost surely, 2^840124913 is an apocalyptic number.

It is an amenable number.

840124913 is a deficient number, since it is larger than the sum of its proper divisors (3515407).

840124913 is a wasteful number, since it uses less digits than its factorization.

840124913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515406.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 840124913 is about 28984.9083662516. The cubic root of 840124913 is about 943.5855636903.

The spelling of 840124913 in words is "eight hundred forty million, one hundred twenty-four thousand, nine hundred thirteen".