164787842 has 4 divisors (see below), whose sum is σ = 247181766. Its totient is φ = 82393920.

The previous prime is 164787841. The next prime is 164787881. The reversal of 164787842 is 248787461.

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

It can be written as a sum of positive squares in only one way, i.e., 125462401 + 39325441 = 11201^2 + 6271^2 .

It is not an unprimeable number, because it can be changed into a prime (164787841) 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 as a sum of consecutive naturals, namely, 41196959 + ... + 41196962.

Almost surely, 2^164787842 is an apocalyptic number.

164787842 is a deficient number, since it is larger than the sum of its proper divisors (82393924).

164787842 is an equidigital number, since it uses as much as digits as its factorization.

164787842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82393923.

The product of its digits is 602112, while the sum is 47.

The square root of 164787842 is about 12836.9716833839. The cubic root of 164787842 is about 548.2454744986.

The spelling of 164787842 in words is "one hundred sixty-four million, seven hundred eighty-seven thousand, eight hundred forty-two".