164942805 has 8 divisors (see below), whose sum is σ = 263908512. Its totient is φ = 87969488.

The previous prime is 164942803. The next prime is 164942809. The reversal of 164942805 is 508249461.

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

It is a cyclic number.

It is not a de Polignac number, because 164942805 - 2¹ = 164942803 is a prime.

It is a super-2 number, since 2×164942805² = 54412257842536050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164942803) 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, 5498079 + ... + 5498108.

It is an arithmetic number, because the mean of its divisors is an integer number (32988564).

Almost surely, 2^164942805 is an apocalyptic number.

164942805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164942805 is a deficient number, since it is larger than the sum of its proper divisors (98965707).

164942805 is a wasteful number, since it uses less digits than its factorization.

164942805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10996195.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 164942805 is about 12843.0060733459. The cubic root of 164942805 is about 548.4172734726.

The spelling of 164942805 in words is "one hundred sixty-four million, nine hundred forty-two thousand, eight hundred five".