164838742 has 4 divisors (see below), whose sum is σ = 247258116. Its totient is φ = 82419370.

The previous prime is 164838733. The next prime is 164838763. The reversal of 164838742 is 247838461.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41209684 + ... + 41209687.

It is an arithmetic number, because the mean of its divisors is an integer number (61814529).

Almost surely, 2^164838742 is an apocalyptic number.

164838742 is a deficient number, since it is larger than the sum of its proper divisors (82419374).

164838742 is an equidigital number, since it uses as much as digits as its factorization.

164838742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82419373.

The product of its digits is 258048, while the sum is 43.

The square root of 164838742 is about 12838.9540851270. The cubic root of 164838742 is about 548.3019164093.

The spelling of 164838742 in words is "one hundred sixty-four million, eight hundred thirty-eight thousand, seven hundred forty-two".