189310421 has 2 divisors, whose sum is σ = 189310422. Its totient is φ = 189310420.

The previous prime is 189310417. The next prime is 189310441. The reversal of 189310421 is 124013981.

189310421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182628196 + 6682225 = 13514^2 + 2585^2 .

It is a cyclic number.

It is not a de Polignac number, because 189310421 - 2² = 189310417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189310441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94655210 + 94655211.

It is an arithmetic number, because the mean of its divisors is an integer number (94655211).

Almost surely, 2^189310421 is an apocalyptic number.

It is an amenable number.

189310421 is a deficient number, since it is larger than the sum of its proper divisors (1).

189310421 is an equidigital number, since it uses as much as digits as its factorization.

189310421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 189310421 is about 13759.0123555435. The cubic root of 189310421 is about 574.1933702846.

The spelling of 189310421 in words is "one hundred eighty-nine million, three hundred ten thousand, four hundred twenty-one".