1396232981 has 16 divisors (see below), whose sum is σ = 1647233280. Its totient is φ = 1166733120.

The previous prime is 1396232953. The next prime is 1396232987. The reversal of 1396232981 is 1892326931.

It is a cyclic number.

It is not a de Polignac number, because 1396232981 - 2¹⁴ = 1396216597 is a prime.

It is a super-2 number, since 2×1396232981² = 3898933074464292722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396232987) 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, 13751 + ... + 54603.

It is an arithmetic number, because the mean of its divisors is an integer number (102952080).

Almost surely, 2^1396232981 is an apocalyptic number.

1396232981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1396232981 is a deficient number, since it is larger than the sum of its proper divisors (251000299).

1396232981 is a wasteful number, since it uses less digits than its factorization.

1396232981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41116.

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

The square root of 1396232981 is about 37366.2010512174. The cubic root of 1396232981 is about 1117.6846783086.

The spelling of 1396232981 in words is "one billion, three hundred ninety-six million, two hundred thirty-two thousand, nine hundred eighty-one".