2487791 has 2 divisors, whose sum is σ = 2487792. Its totient is φ = 2487790.

The previous prime is 2487787. The next prime is 2487809. The reversal of 2487791 is 1977842.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2487791 - 2² = 2487787 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2487701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1243895 + 1243896.

It is an arithmetic number, because the mean of its divisors is an integer number (1243896).

2^2487791 is an apocalyptic number.

2487791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2487791 is an equidigital number, since it uses as much as digits as its factorization.

2487791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 2487791 is about 1577.2732800628. The cubic root of 2487791 is about 135.4995846994.

The spelling of 2487791 in words is "two million, four hundred eighty-seven thousand, seven hundred ninety-one".