164783749 has 8 divisors (see below), whose sum is σ = 177626232. Its totient is φ = 151965120.

The previous prime is 164783747. The next prime is 164783807. The reversal of 164783749 is 947387461.

It can be written as a sum of positive squares in 4 ways, for example, as 6200100 + 158583649 = 2490^2 + 12593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164783749 - 2¹ = 164783747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164783747) 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 7 ways as a sum of consecutive naturals, for example, 9987 + ... + 20719.

It is an arithmetic number, because the mean of its divisors is an integer number (22203279).

Almost surely, 2^164783749 is an apocalyptic number.

It is an amenable number.

164783749 is a deficient number, since it is larger than the sum of its proper divisors (12842483).

164783749 is a wasteful number, since it uses less digits than its factorization.

164783749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11927.

The product of its digits is 1016064, while the sum is 49.

The square root of 164783749 is about 12836.8122600590. The cubic root of 164783749 is about 548.2409353545.

The spelling of 164783749 in words is "one hundred sixty-four million, seven hundred eighty-three thousand, seven hundred forty-nine".