1387393319 has 16 divisors (see below), whose sum is σ = 1599427200. Its totient is φ = 1192690656.

The previous prime is 1387393297. The next prime is 1387393331. The reversal of 1387393319 is 9133937831.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387393319 is a prime.

It is a super-2 number, since 2×1387393319² = 3849720443211671522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387393369) 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, 33029 + ... + 62174.

It is an arithmetic number, because the mean of its divisors is an integer number (99964200).

Almost surely, 2^1387393319 is an apocalyptic number.

1387393319 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1387393319 is a deficient number, since it is larger than the sum of its proper divisors (212033881).

1387393319 is a wasteful number, since it uses less digits than its factorization.

1387393319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95294.

The product of its digits is 367416, while the sum is 47.

The square root of 1387393319 is about 37247.7290448693. The cubic root of 1387393319 is about 1115.3209661345.

The spelling of 1387393319 in words is "one billion, three hundred eighty-seven million, three hundred ninety-three thousand, three hundred nineteen".