13981797 has 12 divisors (see below), whose sum is σ = 20386080. Its totient is φ = 9233448.

The previous prime is 13981789. The next prime is 13981801. The reversal of 13981797 is 79718931.

13981797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13981797 - 2³ = 13981789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13981727) 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, 6297 + ... + 8222.

It is an arithmetic number, because the mean of its divisors is an integer number (1698840).

Almost surely, 2^13981797 is an apocalyptic number.

It is an amenable number.

13981797 is a deficient number, since it is larger than the sum of its proper divisors (6404283).

13981797 is a wasteful number, since it uses less digits than its factorization.

13981797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14632 (or 14629 counting only the distinct ones).

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

The square root of 13981797 is about 3739.2241173805. The cubic root of 13981797 is about 240.9097243993.

The spelling of 13981797 in words is "thirteen million, nine hundred eighty-one thousand, seven hundred ninety-seven".