2291986987 has 8 divisors (see below), whose sum is σ = 2341818000. Its totient is φ = 2242615584.

The previous prime is 2291986981. The next prime is 2291987011. The reversal of 2291986987 is 7896891922.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2291986987 - 2⁷ = 2291986859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2291986981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104812 + ... + 124777.

It is an arithmetic number, because the mean of its divisors is an integer number (292727250).

Almost surely, 2^2291986987 is an apocalyptic number.

2291986987 is a deficient number, since it is larger than the sum of its proper divisors (49831013).

2291986987 is a wasteful number, since it uses less digits than its factorization.

2291986987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229805.

The product of its digits is 7838208, while the sum is 61.

The square root of 2291986987 is about 47874.7009076819. The cubic root of 2291986987 is about 1318.4714068042.

The spelling of 2291986987 in words is "two billion, two hundred ninety-one million, nine hundred eighty-six thousand, nine hundred eighty-seven".