992903213 has 2 divisors, whose sum is σ = 992903214. Its totient is φ = 992903212.

The previous prime is 992903209. The next prime is 992903257. The reversal of 992903213 is 312309299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 685497124 + 307406089 = 26182^2 + 17533^2 .

It is an emirp because it is prime and its reverse (312309299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 992903213 - 2² = 992903209 is a prime.

It is a super-4 number, since 4×992903213⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (992903203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496451606 + 496451607.

It is an arithmetic number, because the mean of its divisors is an integer number (496451607).

Almost surely, 2^992903213 is an apocalyptic number.

It is an amenable number.

992903213 is a deficient number, since it is larger than the sum of its proper divisors (1).

992903213 is an equidigital number, since it uses as much as digits as its factorization.

992903213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 992903213 is about 31510.3667544508. The cubic root of 992903213 is about 997.6287861223.

The spelling of 992903213 in words is "nine hundred ninety-two million, nine hundred three thousand, two hundred thirteen".