4591999987 has 2 divisors, whose sum is σ = 4591999988. Its totient is φ = 4591999986.

The previous prime is 4591999943. The next prime is 4592000053. The reversal of 4591999987 is 7899991954.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4591999987 - 2¹⁹ = 4591475699 is a prime.

It is not a weakly prime, because it can be changed into another prime (4591999927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2295999993 + 2295999994.

It is an arithmetic number, because the mean of its divisors is an integer number (2295999994).

Almost surely, 2^4591999987 is an apocalyptic number.

4591999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4591999987 is an equidigital number, since it uses as much as digits as its factorization.

4591999987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66134880, while the sum is 70.

The square root of 4591999987 is about 67764.2972884689. The cubic root of 4591999987 is about 1662.1388198523.

The spelling of 4591999987 in words is "four billion, five hundred ninety-one million, nine hundred ninety-nine thousand, nine hundred eighty-seven".