189072913 has 2 divisors, whose sum is σ = 189072914. Its totient is φ = 189072912.

The previous prime is 189072893. The next prime is 189072967. The reversal of 189072913 is 319270981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169208064 + 19864849 = 13008^2 + 4457^2 .

It is a cyclic number.

It is not a de Polignac number, because 189072913 - 2⁵ = 189072881 is a prime.

It is not a weakly prime, because it can be changed into another prime (189072973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94536456 + 94536457.

It is an arithmetic number, because the mean of its divisors is an integer number (94536457).

Almost surely, 2^189072913 is an apocalyptic number.

It is an amenable number.

189072913 is a deficient number, since it is larger than the sum of its proper divisors (1).

189072913 is an equidigital number, since it uses as much as digits as its factorization.

189072913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 189072913 is about 13750.3786493318. The cubic root of 189072913 is about 573.9531429900.

The spelling of 189072913 in words is "one hundred eighty-nine million, seventy-two thousand, nine hundred thirteen".