189514621 has 2 divisors, whose sum is σ = 189514622. Its totient is φ = 189514620.

The previous prime is 189514609. The next prime is 189514651. The reversal of 189514621 is 126415981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134235396 + 55279225 = 11586^2 + 7435^2 .

It is a cyclic number.

It is not a de Polignac number, because 189514621 - 2²³ = 181126013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189514651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94757310 + 94757311.

It is an arithmetic number, because the mean of its divisors is an integer number (94757311).

Almost surely, 2^189514621 is an apocalyptic number.

It is an amenable number.

189514621 is a deficient number, since it is larger than the sum of its proper divisors (1).

189514621 is an equidigital number, since it uses as much as digits as its factorization.

189514621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 37.

The square root of 189514621 is about 13766.4309463274. The cubic root of 189514621 is about 574.3997476434.

The spelling of 189514621 in words is "one hundred eighty-nine million, five hundred fourteen thousand, six hundred twenty-one".