2315987 has 4 divisors (see below), whose sum is σ = 2354016. Its totient is φ = 2277960.

The previous prime is 2315983. The next prime is 2315993. The reversal of 2315987 is 7895132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2315987 - 2² = 2315983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2315981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18923 + ... + 19044.

It is an arithmetic number, because the mean of its divisors is an integer number (588504).

2^2315987 is an apocalyptic number.

2315987 is a deficient number, since it is larger than the sum of its proper divisors (38029).

2315987 is an equidigital number, since it uses as much as digits as its factorization.

2315987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38028.

The product of its digits is 15120, while the sum is 35.

The square root of 2315987 is about 1521.8367192311. The cubic root of 2315987 is about 132.3057459654.

The spelling of 2315987 in words is "two million, three hundred fifteen thousand, nine hundred eighty-seven".