1387664013 has 8 divisors (see below), whose sum is σ = 1856056608. Its totient is φ = 922190384.

The previous prime is 1387664009. The next prime is 1387664023. The reversal of 1387664013 is 3104667831.

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 1387664013 - 2² = 1387664009 is a prime.

It is a super-2 number, since 2×1387664013² = 3851222825950528338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387664023) 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, 728631 + ... + 730532.

It is an arithmetic number, because the mean of its divisors is an integer number (232007076).

Almost surely, 2^1387664013 is an apocalyptic number.

It is an amenable number.

1387664013 is a deficient number, since it is larger than the sum of its proper divisors (468392595).

1387664013 is a wasteful number, since it uses less digits than its factorization.

1387664013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459483.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 1387664013 is about 37251.3625656834. The cubic root of 1387664013 is about 1115.3934980921.

The spelling of 1387664013 in words is "one billion, three hundred eighty-seven million, six hundred sixty-four thousand, thirteen".