905973861 has 32 divisors (see below), whose sum is σ = 1317076992. Its totient is φ = 550630080.

The previous prime is 905973781. The next prime is 905973863. The reversal of 905973861 is 168379509.

It is not a de Polignac number, because 905973861 - 2¹⁷ = 905842789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 905973861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905973863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1956516 + ... + 1956978.

It is an arithmetic number, because the mean of its divisors is an integer number (41158656).

Almost surely, 2^905973861 is an apocalyptic number.

It is an amenable number.

905973861 is a deficient number, since it is larger than the sum of its proper divisors (411103131).

905973861 is a wasteful number, since it uses less digits than its factorization.

905973861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 905973861 is about 30099.3996783989. The cubic root of 905973861 is about 967.6208605165.

The spelling of 905973861 in words is "nine hundred five million, nine hundred seventy-three thousand, eight hundred sixty-one".