2530991 has 2 divisors, whose sum is σ = 2530992. Its totient is φ = 2530990.

The previous prime is 2530987. The next prime is 2530993. The reversal of 2530991 is 1990352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2530991 - 2² = 2530987 is a prime.

Together with 2530993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2530993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265495 + 1265496.

It is an arithmetic number, because the mean of its divisors is an integer number (1265496).

2^2530991 is an apocalyptic number.

2530991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2530991 is an equidigital number, since it uses as much as digits as its factorization.

2530991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 2530991 is about 1590.9088597402. The cubic root of 2530991 is about 136.2793960645.

The spelling of 2530991 in words is "two million, five hundred thirty thousand, nine hundred ninety-one".