2430991 has 2 divisors, whose sum is σ = 2430992. Its totient is φ = 2430990.

The previous prime is 2430979. The next prime is 2430997. The reversal of 2430991 is 1990342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2430991 - 2¹⁵ = 2398223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2430997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215495 + 1215496.

It is an arithmetic number, because the mean of its divisors is an integer number (1215496).

2^2430991 is an apocalyptic number.

2430991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2430991 is an equidigital number, since it uses as much as digits as its factorization.

2430991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 2430991 is about 1559.1635578091. The cubic root of 2430991 is about 134.4604159297.

The spelling of 2430991 in words is "two million, four hundred thirty thousand, nine hundred ninety-one".