990113587 has 2 divisors, whose sum is σ = 990113588. Its totient is φ = 990113586.

The previous prime is 990113573. The next prime is 990113603. The reversal of 990113587 is 785311099.

It is a weak prime.

It is an emirp because it is prime and its reverse (785311099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990113587 - 2⁷ = 990113459 is a prime.

It is not a weakly prime, because it can be changed into another prime (990113567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495056793 + 495056794.

It is an arithmetic number, because the mean of its divisors is an integer number (495056794).

Almost surely, 2^990113587 is an apocalyptic number.

990113587 is a deficient number, since it is larger than the sum of its proper divisors (1).

990113587 is an equidigital number, since it uses as much as digits as its factorization.

990113587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 990113587 is about 31466.0704092519. The cubic root of 990113587 is about 996.6936088261.

The spelling of 990113587 in words is "nine hundred ninety million, one hundred thirteen thousand, five hundred eighty-seven".