101881399 has 2 divisors, whose sum is σ = 101881400. Its totient is φ = 101881398.

The previous prime is 101881393. The next prime is 101881489. The reversal of 101881399 is 993188101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101881399 - 2¹⁵ = 101848631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101881393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50940699 + 50940700.

It is an arithmetic number, because the mean of its divisors is an integer number (50940700).

Almost surely, 2^101881399 is an apocalyptic number.

101881399 is a deficient number, since it is larger than the sum of its proper divisors (1).

101881399 is an equidigital number, since it uses as much as digits as its factorization.

101881399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 40.

The square root of 101881399 is about 10093.6316061168. The cubic root of 101881399 is about 467.0517101637.

The spelling of 101881399 in words is "one hundred one million, eight hundred eighty-one thousand, three hundred ninety-nine".