13897905 has 16 divisors (see below), whose sum is σ = 25413504. Its totient is φ = 6353280.

The previous prime is 13897883. The next prime is 13897913. The reversal of 13897905 is 50979831.

It is a happy number.

It is not a de Polignac number, because 13897905 - 2⁶ = 13897841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66076 + ... + 66285.

It is an arithmetic number, because the mean of its divisors is an integer number (1588344).

Almost surely, 2^13897905 is an apocalyptic number.

13897905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13897905 is a deficient number, since it is larger than the sum of its proper divisors (11515599).

13897905 is a wasteful number, since it uses less digits than its factorization.

13897905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132376.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 13897905 is about 3727.9894044914. The cubic root of 13897905 is about 240.4269310630.

The spelling of 13897905 in words is "thirteen million, eight hundred ninety-seven thousand, nine hundred five".