13997770 has 8 divisors (see below), whose sum is σ = 25196004. Its totient is φ = 5599104.

The previous prime is 13997761. The next prime is 13997791. The reversal of 13997770 is 7779931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11363641 + 2634129 = 3371^2 + 1623^2 .

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, 699879 + ... + 699898.

Almost surely, 2^13997770 is an apocalyptic number.

13997770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13997770 is a deficient number, since it is larger than the sum of its proper divisors (11198234).

13997770 is a wasteful number, since it uses less digits than its factorization.

13997770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399784.

The product of its (nonzero) digits is 83349, while the sum is 43.

The square root of 13997770 is about 3741.3593786216. The cubic root of 13997770 is about 241.0014290303.

The spelling of 13997770 in words is "thirteen million, nine hundred ninety-seven thousand, seven hundred seventy".