189729027842 has 4 divisors (see below), whose sum is σ = 284593541766. Its totient is φ = 94864513920.

The previous prime is 189729027827. The next prime is 189729027863. The reversal of 189729027842 is 248720927981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 184117369921 + 5611657921 = 429089^2 + 74911^2 .

It is a super-2 number, since 2×189729027842² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47432256959 + ... + 47432256962.

Almost surely, 2^189729027842 is an apocalyptic number.

189729027842 is a deficient number, since it is larger than the sum of its proper divisors (94864513924).

189729027842 is an equidigital number, since it uses as much as digits as its factorization.

189729027842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94864513923.

The product of its (nonzero) digits is 8128512, while the sum is 59.

The spelling of 189729027842 in words is "one hundred eighty-nine billion, seven hundred twenty-nine million, twenty-seven thousand, eight hundred forty-two".