13379731 has 4 divisors (see below), whose sum is σ = 14166792. Its totient is φ = 12592672.

The previous prime is 13379711. The next prime is 13379749. The reversal of 13379731 is 13797331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13379731 - 2¹⁷ = 13248659 is a prime.

It is a super-2 number, since 2×13379731² = 358034403264722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13379711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393505 + ... + 393538.

It is an arithmetic number, because the mean of its divisors is an integer number (3541698).

Almost surely, 2^13379731 is an apocalyptic number.

13379731 is a deficient number, since it is larger than the sum of its proper divisors (787061).

13379731 is an equidigital number, since it uses as much as digits as its factorization.

13379731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787060.

The product of its digits is 11907, while the sum is 34.

The square root of 13379731 is about 3657.8314613990. The cubic root of 13379731 is about 237.4009544529.

The spelling of 13379731 in words is "thirteen million, three hundred seventy-nine thousand, seven hundred thirty-one".