2491399067 has 2 divisors, whose sum is σ = 2491399068. Its totient is φ = 2491399066.

The previous prime is 2491399049. The next prime is 2491399081. The reversal of 2491399067 is 7609931942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2491399067 - 2¹⁴ = 2491382683 is a prime.

It is a super-2 number, since 2×2491399067² = 12414138622096940978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2491392067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245699533 + 1245699534.

It is an arithmetic number, because the mean of its divisors is an integer number (1245699534).

Almost surely, 2^2491399067 is an apocalyptic number.

2491399067 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491399067 is an equidigital number, since it uses as much as digits as its factorization.

2491399067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 2491399067 is about 49913.9165664246. The cubic root of 2491399067 is about 1355.6505850354.

The spelling of 2491399067 in words is "two billion, four hundred ninety-one million, three hundred ninety-nine thousand, sixty-seven".