189740847 has 8 divisors (see below), whose sum is σ = 259825456. Its totient is φ = 123075072.

The previous prime is 189740843. The next prime is 189740849. The reversal of 189740847 is 748047981.

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

It is not a de Polignac number, because 189740847 - 2² = 189740843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189740796 and 189740805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189740843) 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, 854578 + ... + 854799.

It is an arithmetic number, because the mean of its divisors is an integer number (32478182).

Almost surely, 2^189740847 is an apocalyptic number.

189740847 is a deficient number, since it is larger than the sum of its proper divisors (70084609).

189740847 is a wasteful number, since it uses less digits than its factorization.

189740847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709417.

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 189740847 is about 13774.6450770973. The cubic root of 189740847 is about 574.6282128414.

The spelling of 189740847 in words is "one hundred eighty-nine million, seven hundred forty thousand, eight hundred forty-seven".