13937691 has 8 divisors (see below), whose sum is σ = 18602064. Its totient is φ = 9282560.

The previous prime is 13937687. The next prime is 13937699. The reversal of 13937691 is 19673931.

13937691 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 13937691 - 2² = 13937687 is a prime.

It is a super-2 number, since 2×13937691² = 388518460822962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13937699) 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, 2875 + ... + 6011.

It is an arithmetic number, because the mean of its divisors is an integer number (2325258).

Almost surely, 2^13937691 is an apocalyptic number.

13937691 is a deficient number, since it is larger than the sum of its proper divisors (4664373).

13937691 is a wasteful number, since it uses less digits than its factorization.

13937691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621.

The product of its digits is 30618, while the sum is 39.

The square root of 13937691 is about 3733.3217112914. The cubic root of 13937691 is about 240.6561385688.

The spelling of 13937691 in words is "thirteen million, nine hundred thirty-seven thousand, six hundred ninety-one".