164688587 has 4 divisors (see below), whose sum is σ = 188215536. Its totient is φ = 141161640.

The previous prime is 164688577. The next prime is 164688607. The reversal of 164688587 is 785886461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 785886461 = 8713 ⋅90197.

It is a cyclic number.

It is not a de Polignac number, because 164688587 - 2¹⁸ = 164426443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164688527) 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, 11763464 + ... + 11763477.

It is an arithmetic number, because the mean of its divisors is an integer number (47053884).

Almost surely, 2^164688587 is an apocalyptic number.

164688587 is a deficient number, since it is larger than the sum of its proper divisors (23526949).

164688587 is an equidigital number, since it uses as much as digits as its factorization.

164688587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23526948.

The product of its digits is 2580480, while the sum is 53.

The square root of 164688587 is about 12833.1051191830. The cubic root of 164688587 is about 548.1353793345.

The spelling of 164688587 in words is "one hundred sixty-four million, six hundred eighty-eight thousand, five hundred eighty-seven".