189345479 has 2 divisors, whose sum is σ = 189345480. Its totient is φ = 189345478.

The previous prime is 189345463. The next prime is 189345517. The reversal of 189345479 is 974543981.

It is a weak prime.

It is an emirp because it is prime and its reverse (974543981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189345479 - 2⁴ = 189345463 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189345419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94672739 + 94672740.

It is an arithmetic number, because the mean of its divisors is an integer number (94672740).

Almost surely, 2^189345479 is an apocalyptic number.

189345479 is a deficient number, since it is larger than the sum of its proper divisors (1).

189345479 is an equidigital number, since it uses as much as digits as its factorization.

189345479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 189345479 is about 13760.2862978937. The cubic root of 189345479 is about 574.2288126523.

The spelling of 189345479 in words is "one hundred eighty-nine million, three hundred forty-five thousand, four hundred seventy-nine".