164990465 has 4 divisors (see below), whose sum is σ = 197988564. Its totient is φ = 131992368.

The previous prime is 164990461. The next prime is 164990467. The reversal of 164990465 is 564099461.

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 54656449 + 110334016 = 7393^2 + 10504^2 .

It is a cyclic number.

It is not a de Polignac number, because 164990465 - 2² = 164990461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164990461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16499042 + ... + 16499051.

It is an arithmetic number, because the mean of its divisors is an integer number (49497141).

Almost surely, 2^164990465 is an apocalyptic number.

It is an amenable number.

164990465 is a deficient number, since it is larger than the sum of its proper divisors (32998099).

164990465 is an equidigital number, since it uses as much as digits as its factorization.

164990465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32998098.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 164990465 is about 12844.8614239314. The cubic root of 164990465 is about 548.4700898619.

The spelling of 164990465 in words is "one hundred sixty-four million, nine hundred ninety thousand, four hundred sixty-five".