189319729 has 2 divisors, whose sum is σ = 189319730. Its totient is φ = 189319728.

The previous prime is 189319699. The next prime is 189319747. The reversal of 189319729 is 927913981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167650704 + 21669025 = 12948^2 + 4655^2 .

It is a cyclic number.

It is not a de Polignac number, because 189319729 - 2¹³ = 189311537 is a prime.

It is not a weakly prime, because it can be changed into another prime (189319799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94659864 + 94659865.

It is an arithmetic number, because the mean of its divisors is an integer number (94659865).

Almost surely, 2^189319729 is an apocalyptic number.

It is an amenable number.

189319729 is a deficient number, since it is larger than the sum of its proper divisors (1).

189319729 is an equidigital number, since it uses as much as digits as its factorization.

189319729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 49.

The square root of 189319729 is about 13759.3506024085. The cubic root of 189319729 is about 574.2027807619.

The spelling of 189319729 in words is "one hundred eighty-nine million, three hundred nineteen thousand, seven hundred twenty-nine".