165189854 has 4 divisors (see below), whose sum is σ = 247784784. Its totient is φ = 82594926.

The previous prime is 165189851. The next prime is 165189859. The reversal of 165189854 is 458981561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 458981561 = 4969 ⋅92369.

It is a junction number, because it is equal to n+sod(n) for n = 165189799 and 165189808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165189851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41297462 + ... + 41297465.

It is an arithmetic number, because the mean of its divisors is an integer number (61946196).

Almost surely, 2^165189854 is an apocalyptic number.

165189854 is a deficient number, since it is larger than the sum of its proper divisors (82594930).

165189854 is an equidigital number, since it uses as much as digits as its factorization.

165189854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82594929.

The product of its digits is 345600, while the sum is 47.

The square root of 165189854 is about 12852.6205110086. The cubic root of 165189854 is about 548.6909407644.

The spelling of 165189854 in words is "one hundred sixty-five million, one hundred eighty-nine thousand, eight hundred fifty-four".