13309479 has 24 divisors (see below), whose sum is σ = 20273760. Its totient is φ = 8397312.

The previous prime is 13309451. The next prime is 13309493. The reversal of 13309479 is 97490331.

13309479 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13309479 - 2¹¹ = 13307431 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13301479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23107 + ... + 23675.

It is an arithmetic number, because the mean of its divisors is an integer number (844740).

Almost surely, 2^13309479 is an apocalyptic number.

13309479 is a deficient number, since it is larger than the sum of its proper divisors (6964281).

13309479 is a wasteful number, since it uses less digits than its factorization.

13309479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 13309479 is about 3648.2158653238. The cubic root of 13309479 is about 236.9847236855.

The spelling of 13309479 in words is "thirteen million, three hundred nine thousand, four hundred seventy-nine".