164255393 has 4 divisors (see below), whose sum is σ = 164636928. Its totient is φ = 163873860.

The previous prime is 164255387. The next prime is 164255461. The reversal of 164255393 is 393552461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 393552461 = 37 ⋅10636553.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164255393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164855393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190121 + ... + 190982.

It is an arithmetic number, because the mean of its divisors is an integer number (41159232).

Almost surely, 2^164255393 is an apocalyptic number.

It is an amenable number.

164255393 is a deficient number, since it is larger than the sum of its proper divisors (381535).

164255393 is an equidigital number, since it uses as much as digits as its factorization.

164255393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381534.

The product of its digits is 97200, while the sum is 38.

The square root of 164255393 is about 12816.2160172182. The cubic root of 164255393 is about 547.6543554002.

The spelling of 164255393 in words is "one hundred sixty-four million, two hundred fifty-five thousand, three hundred ninety-three".