940391913 has 16 divisors (see below), whose sum is σ = 1312042496. Its totient is φ = 598389120.

The previous prime is 940391899. The next prime is 940391923. The reversal of 940391913 is 319193049.

It is not a de Polignac number, because 940391913 - 2⁸ = 940391657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (940391923) 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, 62470 + ... + 76047.

It is an arithmetic number, because the mean of its divisors is an integer number (82002656).

Almost surely, 2^940391913 is an apocalyptic number.

940391913 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

It is an amenable number.

940391913 is a deficient number, since it is larger than the sum of its proper divisors (371650583).

940391913 is a wasteful number, since it uses less digits than its factorization.

940391913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138624.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 940391913 is about 30665.8101637638. The cubic root of 940391913 is about 979.7222289951.

The spelling of 940391913 in words is "nine hundred forty million, three hundred ninety-one thousand, nine hundred thirteen".