101405189 has 2 divisors, whose sum is σ = 101405190. Its totient is φ = 101405188.

The previous prime is 101405131. The next prime is 101405203. The reversal of 101405189 is 981504101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101404900 + 289 = 10070^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 101405189 - 2²⁴ = 84627973 is a prime.

It is a super-2 number, since 2×101405189² = 20566024712251442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101405389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50702594 + 50702595.

It is an arithmetic number, because the mean of its divisors is an integer number (50702595).

Almost surely, 2^101405189 is an apocalyptic number.

It is an amenable number.

101405189 is a deficient number, since it is larger than the sum of its proper divisors (1).

101405189 is an equidigital number, since it uses as much as digits as its factorization.

101405189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 101405189 is about 10070.0143495429. The cubic root of 101405189 is about 466.3228818930.

The spelling of 101405189 in words is "one hundred one million, four hundred five thousand, one hundred eighty-nine".