1391038869 has 24 divisors (see below), whose sum is σ = 2042224576. Its totient is φ = 841579200.

The previous prime is 1391038861. The next prime is 1391038897. The reversal of 1391038869 is 9688301931.

It is not a de Polignac number, because 1391038869 - 2³ = 1391038861 is a prime.

It is a super-2 number, since 2×1391038869² = 3869978270137598322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391038861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226017 + ... + 232089.

Almost surely, 2^1391038869 is an apocalyptic number.

It is an amenable number.

1391038869 is a deficient number, since it is larger than the sum of its proper divisors (651185707).

1391038869 is a wasteful number, since it uses less digits than its factorization.

1391038869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6729 (or 6718 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 1391038869 is about 37296.6334807848. The cubic root of 1391038869 is about 1116.2969936748.

The spelling of 1391038869 in words is "one billion, three hundred ninety-one million, thirty-eight thousand, eight hundred sixty-nine".