13951969 has 2 divisors, whose sum is σ = 13951970. Its totient is φ = 13951968.

The previous prime is 13951957. The next prime is 13951991. The reversal of 13951969 is 96915931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13838400 + 113569 = 3720^2 + 337^2 .

It is a cyclic number.

It is not a de Polignac number, because 13951969 - 2⁵ = 13951937 is a prime.

It is a super-2 number, since 2×13951969² = 389314877953922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13951919) 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, 6975984 + 6975985.

It is an arithmetic number, because the mean of its divisors is an integer number (6975985).

Almost surely, 2^13951969 is an apocalyptic number.

It is an amenable number.

13951969 is a deficient number, since it is larger than the sum of its proper divisors (1).

13951969 is an equidigital number, since it uses as much as digits as its factorization.

13951969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65610, while the sum is 43.

The square root of 13951969 is about 3735.2334599058. The cubic root of 13951969 is about 240.7382878929.

It can be divided in two parts, 1395 and 1969, that added together give a square (3364 = 58²).

The spelling of 13951969 in words is "thirteen million, nine hundred fifty-one thousand, nine hundred sixty-nine".