164735731 has 4 divisors (see below), whose sum is σ = 164958192. Its totient is φ = 164513272.

The previous prime is 164735717. The next prime is 164735759. The reversal of 164735731 is 137537461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137537461 = 8521 ⋅16141.

It is a cyclic number.

It is not a de Polignac number, because 164735731 - 2⁵ = 164735699 is a prime.

It is a super-2 number, since 2×164735731² = 54275722136208722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164736731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110116 + ... + 111601.

It is an arithmetic number, because the mean of its divisors is an integer number (41239548).

Almost surely, 2^164735731 is an apocalyptic number.

164735731 is a deficient number, since it is larger than the sum of its proper divisors (222461).

164735731 is an equidigital number, since it uses as much as digits as its factorization.

164735731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222460.

The product of its digits is 52920, while the sum is 37.

The square root of 164735731 is about 12834.9417996343. The cubic root of 164735731 is about 548.1876776943.

The spelling of 164735731 in words is "one hundred sixty-four million, seven hundred thirty-five thousand, seven hundred thirty-one".