990321414311993 has 2 divisors, whose sum is σ = 990321414311994. Its totient is φ = 990321414311992.

The previous prime is 990321414311897. The next prime is 990321414312007. The reversal of 990321414311993 is 399113414123099.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 974092376465209 + 16229037846784 = 31210453^2 + 4028528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990321414311993 is a prime.

It is not a weakly prime, because it can be changed into another prime (990321414311393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495160707155996 + 495160707155997.

It is an arithmetic number, because the mean of its divisors is an integer number (495160707155997).

Almost surely, 2^{990321414311993} is an apocalyptic number.

It is an amenable number.

990321414311993 is a deficient number, since it is larger than the sum of its proper divisors (1).

990321414311993 is an equidigital number, since it uses as much as digits as its factorization.

990321414311993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5668704, while the sum is 59.

The spelling of 990321414311993 in words is "nine hundred ninety trillion, three hundred twenty-one billion, four hundred fourteen million, three hundred eleven thousand, nine hundred ninety-three".