13309402 has 8 divisors (see below), whose sum is σ = 21138516. Its totient is φ = 6263232.

The previous prime is 13309393. The next prime is 13309411. The reversal of 13309402 is 20490331.

It is an interprime number because it is at equal distance from previous prime (13309393) and next prime (13309411).

It can be written as a sum of positive squares in 2 ways, for example, as 13242321 + 67081 = 3639^2 + 259^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 195693 + ... + 195760.

Almost surely, 2^13309402 is an apocalyptic number.

13309402 is a deficient number, since it is larger than the sum of its proper divisors (7829114).

13309402 is a wasteful number, since it uses less digits than its factorization.

13309402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391472.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13309402 is about 3648.2053122049. The cubic root of 13309402 is about 236.9842666714.

Adding to 13309402 its reverse (20490331), we get a palindrome (33799733).

The spelling of 13309402 in words is "thirteen million, three hundred nine thousand, four hundred two".