13787951 has 2 divisors, whose sum is σ = 13787952. Its totient is φ = 13787950.

The previous prime is 13787947. The next prime is 13787959. The reversal of 13787951 is 15978731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13787951 - 2² = 13787947 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13787899 and 13787908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13787959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6893975 + 6893976.

It is an arithmetic number, because the mean of its divisors is an integer number (6893976).

Almost surely, 2^13787951 is an apocalyptic number.

13787951 is a deficient number, since it is larger than the sum of its proper divisors (1).

13787951 is an equidigital number, since it uses as much as digits as its factorization.

13787951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 41.

The square root of 13787951 is about 3713.2130291703. The cubic root of 13787951 is about 239.7912015011.

It can be divided in two parts, 137 and 87951, that added together give a palindrome (88088).

The spelling of 13787951 in words is "thirteen million, seven hundred eighty-seven thousand, nine hundred fifty-one".