2449991 has 2 divisors, whose sum is σ = 2449992. Its totient is φ = 2449990.

The previous prime is 2449987. The next prime is 2449999. The reversal of 2449991 is 1999442.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2449991 - 2² = 2449987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2449999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1224995 + 1224996.

It is an arithmetic number, because the mean of its divisors is an integer number (1224996).

2^2449991 is an apocalyptic number.

2449991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2449991 is an equidigital number, since it uses as much as digits as its factorization.

2449991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 2449991 is about 1565.2447093027. The cubic root of 2449991 is about 134.8098099152.

The spelling of 2449991 in words is "two million, four hundred forty-nine thousand, nine hundred ninety-one".