1888698881 has 2 divisors, whose sum is σ = 1888698882. Its totient is φ = 1888698880.

The previous prime is 1888698859. The next prime is 1888698883. The reversal of 1888698881 is 1888968881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1740224656 + 148474225 = 41716^2 + 12185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1888698881 - 2⁶ = 1888698817 is a prime.

It is a super-2 number, since 2×1888698881² = 7134366926181304322, which contains 22 as substring.

Together with 1888698883, it forms a pair of twin primes.

It is a Chen prime.

1888698881 is a strobogrammatic number because it is the same when read upside-down.

It is not a weakly prime, because it can be changed into another prime (1888698883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944349440 + 944349441.

It is an arithmetic number, because the mean of its divisors is an integer number (944349441).

Almost surely, 2^1888698881 is an apocalyptic number.

It is an amenable number.

1888698881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1888698881 is an equidigital number, since it uses as much as digits as its factorization.

1888698881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14155776, while the sum is 65.

The square root of 1888698881 is about 43459.1633720669. The cubic root of 1888698881 is about 1236.1018061550.

The spelling of 1888698881 in words is "one billion, eight hundred eighty-eight million, six hundred ninety-eight thousand, eight hundred eighty-one".