13921949 has 2 divisors, whose sum is σ = 13921950. Its totient is φ = 13921948.

The previous prime is 13921937. The next prime is 13921961. The reversal of 13921949 is 94912931.

It is a balanced prime because it is at equal distance from previous prime (13921937) and next prime (13921961).

It can be written as a sum of positive squares in only one way, i.e., 11222500 + 2699449 = 3350^2 + 1643^2 .

It is a cyclic number.

It is not a de Polignac number, because 13921949 - 2¹⁶ = 13856413 is a prime.

It is a super-3 number, since 3×13921949³ (a number of 22 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13921909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6960974 + 6960975.

It is an arithmetic number, because the mean of its divisors is an integer number (6960975).

Almost surely, 2^13921949 is an apocalyptic number.

It is an amenable number.

13921949 is a deficient number, since it is larger than the sum of its proper divisors (1).

13921949 is an equidigital number, since it uses as much as digits as its factorization.

13921949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 38.

The square root of 13921949 is about 3731.2128055098. The cubic root of 13921949 is about 240.5655009802.

The spelling of 13921949 in words is "thirteen million, nine hundred twenty-one thousand, nine hundred forty-nine".