164888731 has 4 divisors (see below), whose sum is σ = 188444272. Its totient is φ = 141333192.

The previous prime is 164888719. The next prime is 164888743. The reversal of 164888731 is 137888461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137888461 = 71 ⋅1942091.

It is an interprime number because it is at equal distance from previous prime (164888719) and next prime (164888743).

It is not a de Polignac number, because 164888731 - 2¹⁵ = 164855963 is a prime.

It is a super-2 number, since 2×164888731² = 54376587221580722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164888701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11777760 + ... + 11777773.

It is an arithmetic number, because the mean of its divisors is an integer number (47111068).

Almost surely, 2^164888731 is an apocalyptic number.

164888731 is a deficient number, since it is larger than the sum of its proper divisors (23555541).

164888731 is an equidigital number, since it uses as much as digits as its factorization.

164888731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23555540.

The product of its digits is 258048, while the sum is 46.

The square root of 164888731 is about 12840.9007082837. The cubic root of 164888731 is about 548.3573368239.

The spelling of 164888731 in words is "one hundred sixty-four million, eight hundred eighty-eight thousand, seven hundred thirty-one".