13309990 has 16 divisors (see below), whose sum is σ = 24179760. Its totient is φ = 5274720.

The previous prime is 13309957. The next prime is 13309991. The reversal of 13309990 is 9990331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13309991) 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, 5016 + ... + 7195.

It is an arithmetic number, because the mean of its divisors is an integer number (1511235).

Almost surely, 2^13309990 is an apocalyptic number.

13309990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13309990 is a deficient number, since it is larger than the sum of its proper divisors (10869770).

13309990 is a wasteful number, since it uses less digits than its factorization.

13309990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12327.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 13309990 is about 3648.2858988846. The cubic root of 13309990 is about 236.9877565527.

The spelling of 13309990 in words is "thirteen million, three hundred nine thousand, nine hundred ninety".