189856247 has 8 divisors (see below), whose sum is σ = 218436000. Its totient is φ = 161640864.

The previous prime is 189856207. The next prime is 189856253. The reversal of 189856247 is 742658981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189856247 - 2¹⁰ = 189855223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189856195 and 189856204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189856207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89972 + ... + 92057.

It is an arithmetic number, because the mean of its divisors is an integer number (27304500).

Almost surely, 2^189856247 is an apocalyptic number.

189856247 is a deficient number, since it is larger than the sum of its proper divisors (28579753).

189856247 is a wasteful number, since it uses less digits than its factorization.

189856247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182185.

The product of its digits is 967680, while the sum is 50.

The square root of 189856247 is about 13778.8332960378. The cubic root of 189856247 is about 574.7446851381.

The spelling of 189856247 in words is "one hundred eighty-nine million, eight hundred fifty-six thousand, two hundred forty-seven".