101989247 has 2 divisors, whose sum is σ = 101989248. Its totient is φ = 101989246.

The previous prime is 101989243. The next prime is 101989289. The reversal of 101989247 is 742989101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101989247 - 2² = 101989243 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101989243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50994623 + 50994624.

It is an arithmetic number, because the mean of its divisors is an integer number (50994624).

Almost surely, 2^101989247 is an apocalyptic number.

101989247 is a deficient number, since it is larger than the sum of its proper divisors (1).

101989247 is an equidigital number, since it uses as much as digits as its factorization.

101989247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 101989247 is about 10098.9725715045. The cubic root of 101989247 is about 467.2164534511.

The spelling of 101989247 in words is "one hundred one million, nine hundred eighty-nine thousand, two hundred forty-seven".