189430693 has 8 divisors (see below), whose sum is σ = 192359448. Its totient is φ = 186511104.

The previous prime is 189430673. The next prime is 189430721. The reversal of 189430693 is 396034981.

It can be written as a sum of positive squares in 4 ways, for example, as 65820769 + 123609924 = 8113^2 + 11118^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189430693 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 (189430673) 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, 47505 + ... + 51337.

It is an arithmetic number, because the mean of its divisors is an integer number (24044931).

Almost surely, 2^189430693 is an apocalyptic number.

It is an amenable number.

189430693 is a deficient number, since it is larger than the sum of its proper divisors (2928755).

189430693 is an equidigital number, since it uses as much as digits as its factorization.

189430693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 189430693 is about 13763.3823241237. The cubic root of 189430693 is about 574.3149426822.

The spelling of 189430693 in words is "one hundred eighty-nine million, four hundred thirty thousand, six hundred ninety-three".