189925633 has 8 divisors (see below), whose sum is σ = 194301800. Its totient is φ = 185597568.

The previous prime is 189925627. The next prime is 189925643. The reversal of 189925633 is 336529981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 74857104 + 115068529 = 8652^2 + 10727^2 .

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

It is a 4-Lehmer number, since φ(189925633) divides (189925633-1)⁴.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189925633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189925643) 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, 3978 + ... + 19891.

It is an arithmetic number, because the mean of its divisors is an integer number (24287725).

Almost surely, 2^189925633 is an apocalyptic number.

189925633 is the 7957-th octagonal number.

It is an amenable number.

189925633 is a deficient number, since it is larger than the sum of its proper divisors (4376167).

189925633 is a wasteful number, since it uses less digits than its factorization.

189925633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24051.

The product of its digits is 349920, while the sum is 46.

The square root of 189925633 is about 13781.3509134627. The cubic root of 189925633 is about 574.8146931541.

The spelling of 189925633 in words is "one hundred eighty-nine million, nine hundred twenty-five thousand, six hundred thirty-three".