13681951 has 2 divisors, whose sum is σ = 13681952. Its totient is φ = 13681950.

The previous prime is 13681907. The next prime is 13681961. The reversal of 13681951 is 15918631.

13681951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (15918631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13681951 - 2¹¹ = 13679903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13681961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6840975 + 6840976.

It is an arithmetic number, because the mean of its divisors is an integer number (6840976).

Almost surely, 2^13681951 is an apocalyptic number.

13681951 is a deficient number, since it is larger than the sum of its proper divisors (1).

13681951 is an equidigital number, since it uses as much as digits as its factorization.

13681951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 34.

The square root of 13681951 is about 3698.9121373723. The cubic root of 13681951 is about 239.1751253482.

The spelling of 13681951 in words is "thirteen million, six hundred eighty-one thousand, nine hundred fifty-one".