13479991 has 8 divisors (see below), whose sum is σ = 15429024. Its totient is φ = 11536800.

The previous prime is 13479979. The next prime is 13480003. The reversal of 13479991 is 19997431.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13479979) and next prime (13480003).

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 13479991 - 2¹⁵ = 13447223 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 (13479391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6141 + ... + 8041.

It is an arithmetic number, because the mean of its divisors is an integer number (1928628).

Almost surely, 2^13479991 is an apocalyptic number.

13479991 is a deficient number, since it is larger than the sum of its proper divisors (1949033).

13479991 is a wasteful number, since it uses less digits than its factorization.

13479991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921.

The product of its digits is 61236, while the sum is 43.

The square root of 13479991 is about 3671.5107244839. The cubic root of 13479991 is about 237.9924614518.

The spelling of 13479991 in words is "thirteen million, four hundred seventy-nine thousand, nine hundred ninety-one".