189420389 has 2 divisors, whose sum is σ = 189420390. Its totient is φ = 189420388.

The previous prime is 189420347. The next prime is 189420419. The reversal of 189420389 is 983024981.

It is a happy number.

189420389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139830625 + 49589764 = 11825^2 + 7042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189420389 is a prime.

It is a super-2 number, since 2×189420389² = 71760167537822642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189420589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94710194 + 94710195.

It is an arithmetic number, because the mean of its divisors is an integer number (94710195).

Almost surely, 2^189420389 is an apocalyptic number.

It is an amenable number.

189420389 is a deficient number, since it is larger than the sum of its proper divisors (1).

189420389 is an equidigital number, since it uses as much as digits as its factorization.

189420389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 189420389 is about 13763.0079924412. The cubic root of 189420389 is about 574.3045292897.

The spelling of 189420389 in words is "one hundred eighty-nine million, four hundred twenty thousand, three hundred eighty-nine".