164427945 has 32 divisors (see below), whose sum is σ = 290252160. Its totient is φ = 78819840.

The previous prime is 164427931. The next prime is 164427947. The reversal of 164427945 is 549724461.

It is not a de Polignac number, because 164427945 - 2⁹ = 164427433 is a prime.

It is a super-3 number, since 3×164427945³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164427897 and 164427906.

It is not an unprimeable number, because it can be changed into a prime (164427947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9087 + ... + 20283.

It is an arithmetic number, because the mean of its divisors is an integer number (9070380).

Almost surely, 2^164427945 is an apocalyptic number.

164427945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164427945 is a deficient number, since it is larger than the sum of its proper divisors (125824215).

164427945 is a wasteful number, since it uses less digits than its factorization.

164427945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11305.

The product of its digits is 241920, while the sum is 42.

The square root of 164427945 is about 12822.9460343558. The cubic root of 164427945 is about 547.8460604867.

The spelling of 164427945 in words is "one hundred sixty-four million, four hundred twenty-seven thousand, nine hundred forty-five".