1391262983 has 8 divisors (see below), whose sum is σ = 1607020560. Its totient is φ = 1190385280.

The previous prime is 1391262967. The next prime is 1391262991. The reversal of 1391262983 is 3892621931.

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 1391262983 - 2⁴ = 1391262967 is a prime.

It is a super-2 number, since 2×1391262983² = 3871225375732116578, 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 (1391262913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3719768 + ... + 3720141.

It is an arithmetic number, because the mean of its divisors is an integer number (200877570).

Almost surely, 2^1391262983 is an apocalyptic number.

1391262983 is a deficient number, since it is larger than the sum of its proper divisors (215757577).

1391262983 is a wasteful number, since it uses less digits than its factorization.

1391262983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7439937.

The product of its digits is 139968, while the sum is 44.

The square root of 1391262983 is about 37299.6378400649. The cubic root of 1391262983 is about 1116.3569403222.

The spelling of 1391262983 in words is "one billion, three hundred ninety-one million, two hundred sixty-two thousand, nine hundred eighty-three".