189306013 has 4 divisors (see below), whose sum is σ = 203868028. Its totient is φ = 174744000.

The previous prime is 189306001. The next prime is 189306037. The reversal of 189306013 is 310603981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310603981 = 1571 ⋅197711.

It can be written as a sum of positive squares in 2 ways, for example, as 113998329 + 75307684 = 10677^2 + 8678^2 .

It is a cyclic number.

It is not a de Polignac number, because 189306013 - 2⁵ = 189305981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186306013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7280988 + ... + 7281013.

It is an arithmetic number, because the mean of its divisors is an integer number (50967007).

Almost surely, 2^189306013 is an apocalyptic number.

189306013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

189306013 is a deficient number, since it is larger than the sum of its proper divisors (14562015).

189306013 is a wasteful number, since it uses less digits than its factorization.

189306013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14562014.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 189306013 is about 13758.8521686949. The cubic root of 189306013 is about 574.1889136466.

Adding to 189306013 its reverse (310603981), we get a palindrome (499909994).

The spelling of 189306013 in words is "one hundred eighty-nine million, three hundred six thousand, thirteen".