990323614877 has 2 divisors, whose sum is σ = 990323614878. Its totient is φ = 990323614876.

The previous prime is 990323614871. The next prime is 990323614883. The reversal of 990323614877 is 778416323099.

It is a balanced prime because it is at equal distance from previous prime (990323614871) and next prime (990323614883).

It can be written as a sum of positive squares in only one way, i.e., 929616075556 + 60707539321 = 964166^2 + 246389^2 .

It is a cyclic number.

It is not a de Polignac number, because 990323614877 - 2²⁴ = 990306837661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990323614871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495161807438 + 495161807439.

It is an arithmetic number, because the mean of its divisors is an integer number (495161807439).

Almost surely, 2^990323614877 is an apocalyptic number.

It is an amenable number.

990323614877 is a deficient number, since it is larger than the sum of its proper divisors (1).

990323614877 is an equidigital number, since it uses as much as digits as its factorization.

990323614877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13716864, while the sum is 59.

The spelling of 990323614877 in words is "nine hundred ninety billion, three hundred twenty-three million, six hundred fourteen thousand, eight hundred seventy-seven".