14993921 has 2 divisors, whose sum is σ = 14993922. Its totient is φ = 14993920.

The previous prime is 14993897. The next prime is 14993929. The reversal of 14993921 is 12939941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14938225 + 55696 = 3865^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 14993921 - 2¹⁰ = 14992897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (14993929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7496960 + 7496961.

It is an arithmetic number, because the mean of its divisors is an integer number (7496961).

Almost surely, 2^14993921 is an apocalyptic number.

It is an amenable number.

14993921 is a deficient number, since it is larger than the sum of its proper divisors (1).

14993921 is an equidigital number, since it uses as much as digits as its factorization.

14993921 is an odious number, because the sum of its binary digits is odd.

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

The square root of 14993921 is about 3872.1984711530. The cubic root of 14993921 is about 246.5878871466.

The spelling of 14993921 in words is "fourteen million, nine hundred ninety-three thousand, nine hundred twenty-one".