13897402 has 4 divisors (see below), whose sum is σ = 20846106. Its totient is φ = 6948700.

The previous prime is 13897369. The next prime is 13897421. The reversal of 13897402 is 20479831.

13897402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20479831 = 4177 ⋅4903.

It can be written as a sum of positive squares in only one way, i.e., 7338681 + 6558721 = 2709^2 + 2561^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3474349 + ... + 3474352.

Almost surely, 2^13897402 is an apocalyptic number.

13897402 is a deficient number, since it is larger than the sum of its proper divisors (6948704).

13897402 is an equidigital number, since it uses as much as digits as its factorization.

13897402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6948703.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 13897402 is about 3727.9219412429. The cubic root of 13897402 is about 240.4240304770.

The spelling of 13897402 in words is "thirteen million, eight hundred ninety-seven thousand, four hundred two".