2749991 has 2 divisors, whose sum is σ = 2749992. Its totient is φ = 2749990.

The previous prime is 2749921. The next prime is 2750021. The reversal of 2749991 is 1999472.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2749991 - 2¹⁴ = 2733607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2749921) 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, 1374995 + 1374996.

It is an arithmetic number, because the mean of its divisors is an integer number (1374996).

2^2749991 is an apocalyptic number.

2749991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2749991 is an equidigital number, since it uses as much as digits as its factorization.

2749991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 2749991 is about 1658.3096815734. The cubic root of 2749991 is about 140.1018136941.

The spelling of 2749991 in words is "two million, seven hundred forty-nine thousand, nine hundred ninety-one".