1391903164 has 12 divisors (see below), whose sum is σ = 2446562664. Its totient is φ = 692885264.

The previous prime is 1391903147. The next prime is 1391903173. The reversal of 1391903164 is 4613091931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765559 + ... + 767374.

It is an arithmetic number, because the mean of its divisors is an integer number (203880222).

Almost surely, 2^1391903164 is an apocalyptic number.

It is an amenable number.

1391903164 is a deficient number, since it is larger than the sum of its proper divisors (1054659500).

1391903164 is a wasteful number, since it uses less digits than its factorization.

1391903164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533164 (or 1533162 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 1391903164 is about 37308.2184511670. The cubic root of 1391903164 is about 1116.5281422977.

The spelling of 1391903164 in words is "one billion, three hundred ninety-one million, nine hundred three thousand, one hundred sixty-four".