189373739 has 4 divisors (see below), whose sum is σ = 190736280. Its totient is φ = 188011200.

The previous prime is 189373721. The next prime is 189373757. The reversal of 189373739 is 937373981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937373981 = 1613 ⋅581137.

It is an interprime number because it is at equal distance from previous prime (189373721) and next prime (189373757).

It is a cyclic number.

It is not a de Polignac number, because 189373739 - 2¹² = 189369643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189373759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681062 + ... + 681339.

It is an arithmetic number, because the mean of its divisors is an integer number (47684070).

Almost surely, 2^189373739 is an apocalyptic number.

189373739 is a deficient number, since it is larger than the sum of its proper divisors (1362541).

189373739 is a wasteful number, since it uses less digits than its factorization.

189373739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362540.

The product of its digits is 857304, while the sum is 50.

The square root of 189373739 is about 13761.3131277506. The cubic root of 189373739 is about 574.2573793039.

The spelling of 189373739 in words is "one hundred eighty-nine million, three hundred seventy-three thousand, seven hundred thirty-nine".