189981063 has 6 divisors (see below), whose sum is σ = 274417104. Its totient is φ = 126654036.

The previous prime is 189981053. The next prime is 189981073. The reversal of 189981063 is 360189981.

189981063 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (189981053) and next prime (189981073).

It is not a de Polignac number, because 189981063 - 2⁸ = 189980807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189981053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10554495 + ... + 10554512.

It is an arithmetic number, because the mean of its divisors is an integer number (45736184).

Almost surely, 2^189981063 is an apocalyptic number.

189981063 is a deficient number, since it is larger than the sum of its proper divisors (84436041).

189981063 is a wasteful number, since it uses less digits than its factorization.

189981063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21109013 (or 21109010 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 189981063 is about 13783.3618177860. The cubic root of 189981063 is about 574.8706078101.

The spelling of 189981063 in words is "one hundred eighty-nine million, nine hundred eighty-one thousand, sixty-three".