189527997 has 8 divisors (see below), whose sum is σ = 253289344. Its totient is φ = 126059328.

The previous prime is 189527977. The next prime is 189527999. The reversal of 189527997 is 799725981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-189527997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189527999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71653 + ... + 74250.

It is an arithmetic number, because the mean of its divisors is an integer number (31661168).

Almost surely, 2^189527997 is an apocalyptic number.

It is an amenable number.

189527997 is a deficient number, since it is larger than the sum of its proper divisors (63761347).

189527997 is a wasteful number, since it uses less digits than its factorization.

189527997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146339.

The product of its digits is 2857680, while the sum is 57.

The square root of 189527997 is about 13766.9167572118. The cubic root of 189527997 is about 574.4132610955.

It can be divided in two parts, 1895 and 27997, that added together give a palindrome (29892).

The spelling of 189527997 in words is "one hundred eighty-nine million, five hundred twenty-seven thousand, nine hundred ninety-seven".