189019387 has 2 divisors, whose sum is σ = 189019388. Its totient is φ = 189019386.

The previous prime is 189019381. The next prime is 189019393. The reversal of 189019387 is 783910981.

It is a balanced prime because it is at equal distance from previous prime (189019381) and next prime (189019393).

It is a cyclic number.

It is not a de Polignac number, because 189019387 - 2¹⁵ = 188986619 is a prime.

It is not a weakly prime, because it can be changed into another prime (189019381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94509693 + 94509694.

It is an arithmetic number, because the mean of its divisors is an integer number (94509694).

Almost surely, 2^189019387 is an apocalyptic number.

189019387 is a deficient number, since it is larger than the sum of its proper divisors (1).

189019387 is an equidigital number, since it uses as much as digits as its factorization.

189019387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 189019387 is about 13748.4321651598. The cubic root of 189019387 is about 573.8989763814.

The spelling of 189019387 in words is "one hundred eighty-nine million, nineteen thousand, three hundred eighty-seven".