164861731 has 8 divisors (see below), whose sum is σ = 167002560. Its totient is φ = 162727488.

The previous prime is 164861729. The next prime is 164861743. The reversal of 164861731 is 137168461.

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 164861731 - 2¹ = 164861729 is a prime.

It is a super-2 number, since 2×164861731² = 54358780696632722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164861831) 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, 66150 + ... + 68596.

It is an arithmetic number, because the mean of its divisors is an integer number (20875320).

Almost surely, 2^164861731 is an apocalyptic number.

164861731 is a deficient number, since it is larger than the sum of its proper divisors (2140829).

164861731 is an equidigital number, since it uses as much as digits as its factorization.

164861731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293.

The product of its digits is 24192, while the sum is 37.

The square root of 164861731 is about 12839.8493371223. The cubic root of 164861731 is about 548.3274046059.

The spelling of 164861731 in words is "one hundred sixty-four million, eight hundred sixty-one thousand, seven hundred thirty-one".