2149993 has 2 divisors, whose sum is σ = 2149994. Its totient is φ = 2149992.

The previous prime is 2149991. The next prime is 2150009. The reversal of 2149993 is 3999412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1774224 + 375769 = 1332^2 + 613^2 .

It is a cyclic number.

It is not a de Polignac number, because 2149993 - 2¹ = 2149991 is a prime.

Together with 2149991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2149991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074996 + 1074997.

It is an arithmetic number, because the mean of its divisors is an integer number (1074997).

2^2149993 is an apocalyptic number.

It is an amenable number.

2149993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2149993 is an equidigital number, since it uses as much as digits as its factorization.

2149993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 2149993 is about 1466.2854428794. The cubic root of 2149993 is about 129.0661479953.

The spelling of 2149993 in words is "two million, one hundred forty-nine thousand, nine hundred ninety-three".