840475957 has 8 divisors (see below), whose sum is σ = 853091712. Its totient is φ = 827954400.

The previous prime is 840475927. The next prime is 840475973. The reversal of 840475957 is 759574048.

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 840475957 - 2⁷ = 840475829 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 840475957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840475907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5469 + ... + 41362.

It is an arithmetic number, because the mean of its divisors is an integer number (106636464).

Almost surely, 2^840475957 is an apocalyptic number.

It is an amenable number.

840475957 is a deficient number, since it is larger than the sum of its proper divisors (12615755).

840475957 is a wasteful number, since it uses less digits than its factorization.

840475957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47099.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The square root of 840475957 is about 28990.9633679186. The cubic root of 840475957 is about 943.7169703102.

The spelling of 840475957 in words is "eight hundred forty million, four hundred seventy-five thousand, nine hundred fifty-seven".