13217690 has 8 divisors (see below), whose sum is σ = 23791860. Its totient is φ = 5287072.

The previous prime is 13217683. The next prime is 13217717. The reversal of 13217690 is 9671231.

It can be written as a sum of positive squares in 2 ways, for example, as 11175649 + 2042041 = 3343^2 + 1429^2 .

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

It is a super-2 number, since 2×13217690² = 349414657872200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660875 + ... + 660894.

Almost surely, 2^13217690 is an apocalyptic number.

13217690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13217690 is a deficient number, since it is larger than the sum of its proper divisors (10574170).

13217690 is a wasteful number, since it uses less digits than its factorization.

13217690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321776.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 13217690 is about 3635.6141159369. The cubic root of 13217690 is about 236.4386770432.

The spelling of 13217690 in words is "thirteen million, two hundred seventeen thousand, six hundred ninety".