998902973 has 2 divisors, whose sum is σ = 998902974. Its totient is φ = 998902972.

The previous prime is 998902951. The next prime is 998902997. The reversal of 998902973 is 379209899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 983324164 + 15578809 = 31358^2 + 3947^2 .

It is an emirp because it is prime and its reverse (379209899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998902973 - 2⁶ = 998902909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998902913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499451486 + 499451487.

It is an arithmetic number, because the mean of its divisors is an integer number (499451487).

Almost surely, 2^998902973 is an apocalyptic number.

It is an amenable number.

998902973 is a deficient number, since it is larger than the sum of its proper divisors (1).

998902973 is an equidigital number, since it uses as much as digits as its factorization.

998902973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 56.

The square root of 998902973 is about 31605.4263220732. The cubic root of 998902973 is about 999.6341905331.

The spelling of 998902973 in words is "nine hundred ninety-eight million, nine hundred two thousand, nine hundred seventy-three".