101993189 has 2 divisors, whose sum is σ = 101993190. Its totient is φ = 101993188.

The previous prime is 101993179. The next prime is 101993207. The reversal of 101993189 is 981399101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101404900 + 588289 = 10070^2 + 767^2 .

It is a cyclic number.

It is not a de Polignac number, because 101993189 - 2⁴ = 101993173 is a prime.

It is a super-2 number, since 2×101993189² = 20805221204779442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101993179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50996594 + 50996595.

It is an arithmetic number, because the mean of its divisors is an integer number (50996595).

Almost surely, 2^101993189 is an apocalyptic number.

It is an amenable number.

101993189 is a deficient number, since it is larger than the sum of its proper divisors (1).

101993189 is an equidigital number, since it uses as much as digits as its factorization.

101993189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 41.

The square root of 101993189 is about 10099.1677379871. The cubic root of 101993189 is about 467.2224728554. Note that the first 3 decimals are identical.

The spelling of 101993189 in words is "one hundred one million, nine hundred ninety-three thousand, one hundred eighty-nine".