164780293 has 4 divisors (see below), whose sum is σ = 173452960. Its totient is φ = 156107628.

The previous prime is 164780281. The next prime is 164780309. The reversal of 164780293 is 392087461.

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: 392087461 = 5167 ⋅75883.

It is a cyclic number.

It is not a de Polignac number, because 164780293 - 2²¹ = 162683141 is a prime.

It is a super-2 number, since 2×164780293² = 54305089922331698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164780263) 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, 4336305 + ... + 4336342.

It is an arithmetic number, because the mean of its divisors is an integer number (43363240).

Almost surely, 2^164780293 is an apocalyptic number.

It is an amenable number.

164780293 is a deficient number, since it is larger than the sum of its proper divisors (8672667).

164780293 is an equidigital number, since it uses as much as digits as its factorization.

164780293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8672666.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 164780293 is about 12836.6776464940. The cubic root of 164780293 is about 548.2371025859.

The spelling of 164780293 in words is "one hundred sixty-four million, seven hundred eighty thousand, two hundred ninety-three".