998370685253 has 2 divisors, whose sum is σ = 998370685254. Its totient is φ = 998370685252.

The previous prime is 998370685219. The next prime is 998370685267. The reversal of 998370685253 is 352586073899.

998370685253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 563005613569 + 435365071684 = 750337^2 + 659822^2 .

It is a cyclic number.

It is not a de Polignac number, because 998370685253 - 2⁶ = 998370685189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998370685253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998370385253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499185342626 + 499185342627.

It is an arithmetic number, because the mean of its divisors is an integer number (499185342627).

Almost surely, 2^998370685253 is an apocalyptic number.

It is an amenable number.

998370685253 is a deficient number, since it is larger than the sum of its proper divisors (1).

998370685253 is an equidigital number, since it uses as much as digits as its factorization.

998370685253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97977600, while the sum is 65.

The spelling of 998370685253 in words is "nine hundred ninety-eight billion, three hundred seventy million, six hundred eighty-five thousand, two hundred fifty-three".