189520447 has 6 divisors (see below), whose sum is σ = 191956128. Its totient is φ = 187115292.

The previous prime is 189520439. The next prime is 189520489. The reversal of 189520447 is 744025981.

It is not a de Polignac number, because 189520447 - 2³ = 189520439 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 (189520417) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8943 + ... + 21424.

It is an arithmetic number, because the mean of its divisors is an integer number (31992688).

Almost surely, 2^189520447 is an apocalyptic number.

189520447 is a deficient number, since it is larger than the sum of its proper divisors (2435681).

189520447 is an frugal number, since it uses more digits than its factorization.

189520447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30525 (or 30446 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 189520447 is about 13766.6425463873. The cubic root of 189520447 is about 574.4056335897.

The spelling of 189520447 in words is "one hundred eighty-nine million, five hundred twenty thousand, four hundred forty-seven".