2309946887 has 2 divisors, whose sum is σ = 2309946888. Its totient is φ = 2309946886.

The previous prime is 2309946883. The next prime is 2309946901. The reversal of 2309946887 is 7886499032.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2309946887 - 2² = 2309946883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2309946883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1154973443 + 1154973444.

It is an arithmetic number, because the mean of its divisors is an integer number (1154973444).

Almost surely, 2^2309946887 is an apocalyptic number.

2309946887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2309946887 is an equidigital number, since it uses as much as digits as its factorization.

2309946887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The square root of 2309946887 is about 48061.9068181861. The cubic root of 2309946887 is about 1321.9062767570.

The spelling of 2309946887 in words is "two billion, three hundred nine million, nine hundred forty-six thousand, eight hundred eighty-seven".