13897719 has 12 divisors (see below), whose sum is σ = 21899592. Its totient is φ = 8422800.

The previous prime is 13897717. The next prime is 13897777. The reversal of 13897719 is 91779831.

It is not a de Polignac number, because 13897719 - 2¹ = 13897717 is a prime.

It is a super-2 number, since 2×13897719² = 386293186805922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13897711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70092 + ... + 70289.

It is an arithmetic number, because the mean of its divisors is an integer number (1824966).

Almost surely, 2^13897719 is an apocalyptic number.

13897719 is a deficient number, since it is larger than the sum of its proper divisors (8001873).

13897719 is a wasteful number, since it uses less digits than its factorization.

13897719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140398 (or 140395 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 13897719 is about 3727.9644579851. The cubic root of 13897719 is about 240.4258584887.

The spelling of 13897719 in words is "thirteen million, eight hundred ninety-seven thousand, seven hundred nineteen".