2487691 has 2 divisors, whose sum is σ = 2487692. Its totient is φ = 2487690.

The previous prime is 2487677. The next prime is 2487697. The reversal of 2487691 is 1967842.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2487691 - 2⁵ = 2487659 is a prime.

It is a super-2 number, since 2×2487691² = 12377213022962, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2²¹ + 4⁷ + 8⁵ + 7⁴ + 6⁷ + 9⁵ + 1 .

It is a self number, because there is not a number n which added to its sum of digits gives 2487691.

It is not a weakly prime, because it can be changed into another prime (2487697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1243845 + 1243846.

It is an arithmetic number, because the mean of its divisors is an integer number (1243846).

2^2487691 is an apocalyptic number.

2487691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2487691 is an equidigital number, since it uses as much as digits as its factorization.

2487691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 2487691 is about 1577.2415794671. The cubic root of 2487691 is about 135.4977691476.

The spelling of 2487691 in words is "two million, four hundred eighty-seven thousand, six hundred ninety-one".