2491369 has 2 divisors, whose sum is σ = 2491370. Its totient is φ = 2491368.

The previous prime is 2491351. The next prime is 2491381. The reversal of 2491369 is 9631942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2442969 + 48400 = 1563^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 2491369 - 2¹¹ = 2489321 is a prime.

It is a super-2 number, since 2×2491369² = 12413838988322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2491339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245684 + 1245685.

It is an arithmetic number, because the mean of its divisors is an integer number (1245685).

2^2491369 is an apocalyptic number.

It is an amenable number.

2491369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491369 is an equidigital number, since it uses as much as digits as its factorization.

2491369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 2491369 is about 1578.4071084483. The cubic root of 2491369 is about 135.5645131539.

The spelling of 2491369 in words is "two million, four hundred ninety-one thousand, three hundred sixty-nine".