164839761 has 6 divisors (see below), whose sum is σ = 238101890. Its totient is φ = 109893168.

The previous prime is 164839757. The next prime is 164839771. The reversal of 164839761 is 167938461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 151290000 + 13549761 = 12300^2 + 3681^2 .

It is not a de Polignac number, because 164839761 - 2² = 164839757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164839771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9157756 + ... + 9157773.

Almost surely, 2^164839761 is an apocalyptic number.

It is an amenable number.

164839761 is a deficient number, since it is larger than the sum of its proper divisors (73262129).

164839761 is a wasteful number, since it uses less digits than its factorization.

164839761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18315535 (or 18315532 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 164839761 is about 12838.9937689836. The cubic root of 164839761 is about 548.3030462377.

It can be divided in two parts, 164839 and 761, that added together give a triangular number (165600 = T₅₇₅).

The spelling of 164839761 in words is "one hundred sixty-four million, eight hundred thirty-nine thousand, seven hundred sixty-one".