2491537999 has 2 divisors, whose sum is σ = 2491538000. Its totient is φ = 2491537998.

The previous prime is 2491537991. The next prime is 2491538011. The reversal of 2491537999 is 9997351942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2491537999 - 2³ = 2491537991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2491537991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245768999 + 1245769000.

It is an arithmetic number, because the mean of its divisors is an integer number (1245769000).

Almost surely, 2^2491537999 is an apocalyptic number.

2491537999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491537999 is an equidigital number, since it uses as much as digits as its factorization.

2491537999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5511240, while the sum is 58.

The square root of 2491537999 is about 49915.3082630970. The cubic root of 2491537999 is about 1355.6757836944.

The spelling of 2491537999 in words is "two billion, four hundred ninety-one million, five hundred thirty-seven thousand, nine hundred ninety-nine".