990748867 has 2 divisors, whose sum is σ = 990748868. Its totient is φ = 990748866.

The previous prime is 990748859. The next prime is 990748879. The reversal of 990748867 is 768847099.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 990748867 - 2³ = 990748859 is a prime.

It is not a weakly prime, because it can be changed into another prime (990748807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495374433 + 495374434.

It is an arithmetic number, because the mean of its divisors is an integer number (495374434).

Almost surely, 2^990748867 is an apocalyptic number.

990748867 is a deficient number, since it is larger than the sum of its proper divisors (1).

990748867 is an equidigital number, since it uses as much as digits as its factorization.

990748867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 58.

The square root of 990748867 is about 31476.1634733333. The cubic root of 990748867 is about 996.9067305499.

The spelling of 990748867 in words is "nine hundred ninety million, seven hundred forty-eight thousand, eight hundred sixty-seven".