189076021 has 2 divisors, whose sum is σ = 189076022. Its totient is φ = 189076020.

The previous prime is 189075959. The next prime is 189076067. The reversal of 189076021 is 120670981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179184996 + 9891025 = 13386^2 + 3145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189076021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189076421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94538010 + 94538011.

It is an arithmetic number, because the mean of its divisors is an integer number (94538011).

Almost surely, 2^189076021 is an apocalyptic number.

It is an amenable number.

189076021 is a deficient number, since it is larger than the sum of its proper divisors (1).

189076021 is an equidigital number, since it uses as much as digits as its factorization.

189076021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 189076021 is about 13750.4916639370. The cubic root of 189076021 is about 573.9562878730.

The spelling of 189076021 in words is "one hundred eighty-nine million, seventy-six thousand, twenty-one".