1381499817 has 8 divisors (see below), whose sum is σ = 1853301024. Its totient is φ = 915349248.

The previous prime is 1381499789. The next prime is 1381499827. The reversal of 1381499817 is 7189941831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1381499817 - 2²⁷ = 1247282089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1381499817.

It is not an unprimeable number, because it can be changed into a prime (1381499827) 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, 1412088 + ... + 1413065.

It is an arithmetic number, because the mean of its divisors is an integer number (231662628).

Almost surely, 2^1381499817 is an apocalyptic number.

It is an amenable number.

1381499817 is a deficient number, since it is larger than the sum of its proper divisors (471801207).

1381499817 is a wasteful number, since it uses less digits than its factorization.

1381499817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825319.

The product of its digits is 435456, while the sum is 51.

The square root of 1381499817 is about 37168.5326183319. The cubic root of 1381499817 is about 1113.7394689896.

The spelling of 1381499817 in words is "one billion, three hundred eighty-one million, four hundred ninety-nine thousand, eight hundred seventeen".