189507893 has 8 divisors (see below), whose sum is σ = 192178008. Its totient is φ = 186855424.

The previous prime is 189507889. The next prime is 189507911. The reversal of 189507893 is 398705981.

It can be written as a sum of positive squares in 4 ways, for example, as 79530724 + 109977169 = 8918^2 + 10487^2 .

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 189507893 - 2² = 189507889 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 (189507803) 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, 18005 + ... + 26517.

It is an arithmetic number, because the mean of its divisors is an integer number (24022251).

Almost surely, 2^189507893 is an apocalyptic number.

It is an amenable number.

189507893 is a deficient number, since it is larger than the sum of its proper divisors (2670115).

189507893 is a wasteful number, since it uses less digits than its factorization.

189507893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8823.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 189507893 is about 13766.1865816209. The cubic root of 189507893 is about 574.3929502659.

The spelling of 189507893 in words is "one hundred eighty-nine million, five hundred seven thousand, eight hundred ninety-three".