164787461 has 4 divisors (see below), whose sum is σ = 164877132. Its totient is φ = 164697792.

The previous prime is 164787457. The next prime is 164787463.

164787461 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33570436 + 131217025 = 5794^2 + 11455^2 .

It is a cyclic number.

It is not a de Polignac number, because 164787461 - 2² = 164787457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164787463) 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 3 ways as a sum of consecutive naturals, for example, 42020 + ... + 45773.

It is an arithmetic number, because the mean of its divisors is an integer number (41219283).

Almost surely, 2^164787461 is an apocalyptic number.

It is an amenable number.

164787461 is a deficient number, since it is larger than the sum of its proper divisors (89671).

164787461 is an equidigital number, since it uses as much as digits as its factorization.

164787461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89670.

The product of its digits is 225792, while the sum is 44.

The square root of 164787461 is about 12836.9568434267. The cubic root of 164787461 is about 548.2450519721.

The spelling of 164787461 in words is "one hundred sixty-four million, seven hundred eighty-seven thousand, four hundred sixty-one".