13959397 has 8 divisors (see below), whose sum is σ = 15180696. Its totient is φ = 12782592.

The previous prime is 13959389. The next prime is 13959401. The reversal of 13959397 is 79395931.

It can be written as a sum of positive squares in 4 ways, for example, as 10458756 + 3500641 = 3234^2 + 1871^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13959397 - 2³ = 13959389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13959307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10468 + ... + 11725.

It is an arithmetic number, because the mean of its divisors is an integer number (1897587).

Almost surely, 2^13959397 is an apocalyptic number.

13959397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13959397 is a deficient number, since it is larger than the sum of its proper divisors (1221299).

13959397 is a wasteful number, since it uses less digits than its factorization.

13959397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22247.

The product of its digits is 229635, while the sum is 46.

The square root of 13959397 is about 3736.2276429575. The cubic root of 13959397 is about 240.7810031720.

It can be divided in two parts, 139 and 59397, that added together give a square (59536 = 244²).

The spelling of 13959397 in words is "thirteen million, nine hundred fifty-nine thousand, three hundred ninety-seven".