1392717381 has 24 divisors (see below), whose sum is σ = 2061380832. Its totient is φ = 835692000.

The previous prime is 1392717379. The next prime is 1392717383. The reversal of 1392717381 is 1837172931.

It is an interprime number because it is at equal distance from previous prime (1392717379) and next prime (1392717383).

It is not a de Polignac number, because 1392717381 - 2¹ = 1392717379 is a prime.

It is a super-2 number, since 2×1392717381² = 3879323406678998322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392717383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17670 + ... + 55656.

It is an arithmetic number, because the mean of its divisors is an integer number (85890868).

Almost surely, 2^1392717381 is an apocalyptic number.

1392717381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1392717381 is a deficient number, since it is larger than the sum of its proper divisors (668663451).

1392717381 is a wasteful number, since it uses less digits than its factorization.

1392717381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38113 (or 38102 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 1392717381 is about 37319.1288885472. The cubic root of 1392717381 is about 1116.7458104545.

The spelling of 1392717381 in words is "one billion, three hundred ninety-two million, seven hundred seventeen thousand, three hundred eighty-one".