1381915079 has 4 divisors (see below), whose sum is σ = 1382024184. Its totient is φ = 1381805976.

The previous prime is 1381915063. The next prime is 1381915097. The reversal of 1381915079 is 9705191831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1381915079 - 2⁴ = 1381915063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381915679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32612 + ... + 61865.

It is an arithmetic number, because the mean of its divisors is an integer number (345506046).

Almost surely, 2^1381915079 is an apocalyptic number.

1381915079 is a deficient number, since it is larger than the sum of its proper divisors (109105).

1381915079 is an equidigital number, since it uses as much as digits as its factorization.

1381915079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109104.

The product of its (nonzero) digits is 68040, while the sum is 44.

The square root of 1381915079 is about 37174.1184024585. The cubic root of 1381915079 is about 1113.8510499785.

The spelling of 1381915079 in words is "one billion, three hundred eighty-one million, nine hundred fifteen thousand, seventy-nine".