998188000949 has 2 divisors, whose sum is σ = 998188000950. Its totient is φ = 998188000948.

The previous prime is 998188000921. The next prime is 998188000973. The reversal of 998188000949 is 949000881899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896988939025 + 101199061924 = 947095^2 + 318118^2 .

It is a cyclic number.

It is not a de Polignac number, because 998188000949 - 2²⁸ = 997919565493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998188080949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499094000474 + 499094000475.

It is an arithmetic number, because the mean of its divisors is an integer number (499094000475).

Almost surely, 2^998188000949 is an apocalyptic number.

It is an amenable number.

998188000949 is a deficient number, since it is larger than the sum of its proper divisors (1).

998188000949 is an equidigital number, since it uses as much as digits as its factorization.

998188000949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13436928, while the sum is 65.

The spelling of 998188000949 in words is "nine hundred ninety-eight billion, one hundred eighty-eight million, nine hundred forty-nine", and thus it is an aban number.