189400079 has 16 divisors (see below), whose sum is σ = 212699520. Its totient is φ = 167163360.

The previous prime is 189400067. The next prime is 189400087. The reversal of 189400079 is 970004981.

It is not a de Polignac number, because 189400079 - 2⁴ = 189400063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189400039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83549 + ... + 85785.

It is an arithmetic number, because the mean of its divisors is an integer number (13293720).

Almost surely, 2^189400079 is an apocalyptic number.

189400079 is a deficient number, since it is larger than the sum of its proper divisors (23299441).

189400079 is a wasteful number, since it uses less digits than its factorization.

189400079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 189400079 is about 13762.2701252373. The cubic root of 189400079 is about 574.2840025626.

The spelling of 189400079 in words is "one hundred eighty-nine million, four hundred thousand, seventy-nine".