189162009 has 24 divisors (see below), whose sum is σ = 290964960. Its totient is φ = 118009728.

The previous prime is 189161993. The next prime is 189162013. The reversal of 189162009 is 900261981.

It is not a de Polignac number, because 189162009 - 2⁴ = 189161993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189162059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23934 + ... + 30840.

It is an arithmetic number, because the mean of its divisors is an integer number (12123540).

Almost surely, 2^189162009 is an apocalyptic number.

It is an amenable number.

189162009 is a deficient number, since it is larger than the sum of its proper divisors (101802951).

189162009 is a wasteful number, since it uses less digits than its factorization.

189162009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7109 (or 7106 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 189162009 is about 13753.6180330850. The cubic root of 189162009 is about 574.0432826407.

The spelling of 189162009 in words is "one hundred eighty-nine million, one hundred sixty-two thousand, nine".