13949987397 has 16 divisors (see below), whose sum is σ = 19581562560. Its totient is φ = 8809333632.

The previous prime is 13949987369. The next prime is 13949987399. The reversal of 13949987397 is 79378994931.

It is not a de Polignac number, because 13949987397 - 2¹⁸ = 13949725253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13949987399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636343 + ... + 657899.

It is an arithmetic number, because the mean of its divisors is an integer number (1223847660).

Almost surely, 2^13949987397 is an apocalyptic number.

It is an amenable number.

13949987397 is a deficient number, since it is larger than the sum of its proper divisors (5631575163).

13949987397 is a wasteful number, since it uses less digits than its factorization.

13949987397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32932.

The product of its digits is 92588832, while the sum is 69.

The spelling of 13949987397 in words is "thirteen billion, nine hundred forty-nine million, nine hundred eighty-seven thousand, three hundred ninety-seven".