189028997 has 2 divisors, whose sum is σ = 189028998. Its totient is φ = 189028996.

The previous prime is 189028951. The next prime is 189029003. The reversal of 189028997 is 799820981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166693921 + 22335076 = 12911^2 + 4726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189028997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189028097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94514498 + 94514499.

It is an arithmetic number, because the mean of its divisors is an integer number (94514499).

Almost surely, 2^189028997 is an apocalyptic number.

It is an amenable number.

189028997 is a deficient number, since it is larger than the sum of its proper divisors (1).

189028997 is an equidigital number, since it uses as much as digits as its factorization.

189028997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 53.

The square root of 189028997 is about 13748.7816551140. The cubic root of 189028997 is about 573.9087021486.

The spelling of 189028997 in words is "one hundred eighty-nine million, twenty-eight thousand, nine hundred ninety-seven".