198253877 has 2 divisors, whose sum is σ = 198253878. Its totient is φ = 198253876.

The previous prime is 198253837. The next prime is 198253879. The reversal of 198253877 is 778352891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155102116 + 43151761 = 12454^2 + 6569^2 .

It is an emirp because it is prime and its reverse (778352891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198253877 - 2¹⁰ = 198252853 is a prime.

It is a super-2 number, since 2×198253877² = 78609199491062258, which contains 22 as substring.

Together with 198253879, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198253879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99126938 + 99126939.

It is an arithmetic number, because the mean of its divisors is an integer number (99126939).

Almost surely, 2^198253877 is an apocalyptic number.

It is an amenable number.

198253877 is a deficient number, since it is larger than the sum of its proper divisors (1).

198253877 is an equidigital number, since it uses as much as digits as its factorization.

198253877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 50.

The square root of 198253877 is about 14080.2655159624. The cubic root of 198253877 is about 583.0966723977.

The spelling of 198253877 in words is "one hundred ninety-eight million, two hundred fifty-three thousand, eight hundred seventy-seven".