990142977793 has 2 divisors, whose sum is σ = 990142977794. Its totient is φ = 990142977792.

The previous prime is 990142977763. The next prime is 990142977827. The reversal of 990142977793 is 397779241099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 771424942864 + 218718034929 = 878308^2 + 467673^2 .

It is a cyclic number.

It is not a de Polignac number, because 990142977793 - 2²⁵ = 990109423361 is a prime.

It is not a weakly prime, because it can be changed into another prime (990142977763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495071488896 + 495071488897.

It is an arithmetic number, because the mean of its divisors is an integer number (495071488897).

Almost surely, 2^990142977793 is an apocalyptic number.

It is an amenable number.

990142977793 is a deficient number, since it is larger than the sum of its proper divisors (1).

990142977793 is an equidigital number, since it uses as much as digits as its factorization.

990142977793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54010152, while the sum is 67.

The spelling of 990142977793 in words is "nine hundred ninety billion, one hundred forty-two million, nine hundred seventy-seven thousand, seven hundred ninety-three".