189478733 has 8 divisors (see below), whose sum is σ = 193199160. Its totient is φ = 185794560.

The previous prime is 189478711. The next prime is 189478741. The reversal of 189478733 is 337874981.

It can be written as a sum of positive squares in 4 ways, for example, as 3374569 + 186104164 = 1837^2 + 13642^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 189478733 - 2¹⁸ = 189216589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189472733) 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, 1613 + ... + 19533.

It is an arithmetic number, because the mean of its divisors is an integer number (24149895).

Almost surely, 2^189478733 is an apocalyptic number.

It is an amenable number.

189478733 is a deficient number, since it is larger than the sum of its proper divisors (3720427).

189478733 is a wasteful number, since it uses less digits than its factorization.

189478733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18127.

The product of its digits is 1016064, while the sum is 50.

The square root of 189478733 is about 13765.1274240379. The cubic root of 189478733 is about 574.3634877155.

The spelling of 189478733 in words is "one hundred eighty-nine million, four hundred seventy-eight thousand, seven hundred thirty-three".