188898881 has 2 divisors, whose sum is σ = 188898882. Its totient is φ = 188898880.

The previous prime is 188898863. The next prime is 188898889.

188898881 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102111025 + 86787856 = 10105^2 + 9316^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 188898881 - 2¹⁴ = 188882497 is a prime.

It is a super-2 number, since 2×188898881² = 71365574486104322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 188898881.

It is not a weakly prime, because it can be changed into another prime (188898889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94449440 + 94449441.

It is an arithmetic number, because the mean of its divisors is an integer number (94449441).

Almost surely, 2^188898881 is an apocalyptic number.

It is an amenable number.

188898881 is a deficient number, since it is larger than the sum of its proper divisors (1).

188898881 is an equidigital number, since it uses as much as digits as its factorization.

188898881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2359296, while the sum is 59.

The square root of 188898881 is about 13744.0489303553. The cubic root of 188898881 is about 573.7769907071.

The spelling of 188898881 in words is "one hundred eighty-eight million, eight hundred ninety-eight thousand, eight hundred eighty-one".