189947722 has 4 divisors (see below), whose sum is σ = 284921586. Its totient is φ = 94973860.

The previous prime is 189947699. The next prime is 189947729. The reversal of 189947722 is 227749981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 96805921 + 93141801 = 9839^2 + 9651^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (189947729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47486929 + ... + 47486932.

Almost surely, 2^189947722 is an apocalyptic number.

189947722 is a deficient number, since it is larger than the sum of its proper divisors (94973864).

189947722 is an equidigital number, since it uses as much as digits as its factorization.

189947722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94973863.

The product of its digits is 508032, while the sum is 49.

The square root of 189947722 is about 13782.1522992601. The cubic root of 189947722 is about 574.8369765945.

The spelling of 189947722 in words is "one hundred eighty-nine million, nine hundred forty-seven thousand, seven hundred twenty-two".