840913 has 8 divisors (see below), whose sum is σ = 881280. Its totient is φ = 801360.

The previous prime is 840911. The next prime is 840923. The reversal of 840913 is 319048.

840913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 840913 - 2¹ = 840911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840911) 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, 2968 + ... + 3238.

It is an arithmetic number, because the mean of its divisors is an integer number (110160).

2⁸⁴⁰⁹¹³ is an apocalyptic number.

It is an amenable number.

840913 is a deficient number, since it is larger than the sum of its proper divisors (40367).

840913 is a wasteful number, since it uses less digits than its factorization.

840913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 840913 is about 917.0130860571. The cubic root of 840913 is about 94.3880517890.

The spelling of 840913 in words is "eight hundred forty thousand, nine hundred thirteen".