2305987 has 2 divisors, whose sum is σ = 2305988. Its totient is φ = 2305986.

The previous prime is 2305969. The next prime is 2306023. The reversal of 2305987 is 7895032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2305987 - 2¹⁹ = 1781699 is a prime.

It is not a weakly prime, because it can be changed into another prime (2305967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1152993 + 1152994.

It is an arithmetic number, because the mean of its divisors is an integer number (1152994).

2^2305987 is an apocalyptic number.

2305987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2305987 is an equidigital number, since it uses as much as digits as its factorization.

2305987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 2305987 is about 1518.5476614186. The cubic root of 2305987 is about 132.1150473879.

The spelling of 2305987 in words is "two million, three hundred five thousand, nine hundred eighty-seven".