164171491 has 8 divisors (see below), whose sum is σ = 180771264. Its totient is φ = 147850920.

The previous prime is 164171473. The next prime is 164171509. The reversal of 164171491 is 194171461.

164171491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (164171473) and next prime (164171509).

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 164171491 - 2⁵ = 164171459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164471491) 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, 68565 + ... + 70918.

It is an arithmetic number, because the mean of its divisors is an integer number (22596408).

Almost surely, 2^164171491 is an apocalyptic number.

164171491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

164171491 is a deficient number, since it is larger than the sum of its proper divisors (16599773).

164171491 is a wasteful number, since it uses less digits than its factorization.

164171491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139601.

The product of its digits is 6048, while the sum is 34.

The square root of 164171491 is about 12812.9423240722. The cubic root of 164171491 is about 547.5610918534.

The spelling of 164171491 in words is "one hundred sixty-four million, one hundred seventy-one thousand, four hundred ninety-one".