189466421 has 2 divisors, whose sum is σ = 189466422. Its totient is φ = 189466420.

The previous prime is 189466397. The next prime is 189466429. The reversal of 189466421 is 124664981.

189466421 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., 182628196 + 6838225 = 13514^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 189466421 - 2⁶ = 189466357 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 (189466429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94733210 + 94733211.

It is an arithmetic number, because the mean of its divisors is an integer number (94733211).

Almost surely, 2^189466421 is an apocalyptic number.

It is an amenable number.

189466421 is a deficient number, since it is larger than the sum of its proper divisors (1).

189466421 is an equidigital number, since it uses as much as digits as its factorization.

189466421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 189466421 is about 13764.6801996995. The cubic root of 189466421 is about 574.3510470643.

The spelling of 189466421 in words is "one hundred eighty-nine million, four hundred sixty-six thousand, four hundred twenty-one".