13989970 has 8 divisors (see below), whose sum is σ = 25181964. Its totient is φ = 5595984.

The previous prime is 13989953. The next prime is 13990001. The reversal of 13989970 is 7998931.

13989970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13756681 + 233289 = 3709^2 + 483^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 13989970.

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, 699489 + ... + 699508.

Almost surely, 2^13989970 is an apocalyptic number.

13989970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13989970 is a deficient number, since it is larger than the sum of its proper divisors (11191994).

13989970 is a wasteful number, since it uses less digits than its factorization.

13989970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399004.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 13989970 is about 3740.3168314997. The cubic root of 13989970 is about 240.9566561744.

It can be divided in two parts, 139 and 89970, that added together give a palindrome (90109).

The spelling of 13989970 in words is "thirteen million, nine hundred eighty-nine thousand, nine hundred seventy".