164621461 has 4 divisors (see below), whose sum is σ = 164694124. Its totient is φ = 164548800.

The previous prime is 164621449. The next prime is 164621477. The reversal of 164621461 is 164126461.

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 138509361 + 26112100 = 11769^2 + 5110^2 .

It is a cyclic number.

It is not a de Polignac number, because 164621461 - 2⁹ = 164620949 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 (164601461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32820 + ... + 37501.

It is an arithmetic number, because the mean of its divisors is an integer number (41173531).

Almost surely, 2^164621461 is an apocalyptic number.

It is an amenable number.

164621461 is a deficient number, since it is larger than the sum of its proper divisors (72663).

164621461 is an equidigital number, since it uses as much as digits as its factorization.

164621461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72662.

The product of its digits is 6912, while the sum is 31.

The square root of 164621461 is about 12830.4895074194. The cubic root of 164621461 is about 548.0608970722.

The spelling of 164621461 in words is "one hundred sixty-four million, six hundred twenty-one thousand, four hundred sixty-one".