164478901 has 4 divisors (see below), whose sum is σ = 169784704. Its totient is φ = 159173100.

The previous prime is 164478889. The next prime is 164478917. The reversal of 164478901 is 109874461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 109874461 = 59 ⋅1862279.

It is a cyclic number.

It is not a de Polignac number, because 164478901 - 2⁹ = 164478389 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 (164478971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2652855 + ... + 2652916.

It is an arithmetic number, because the mean of its divisors is an integer number (42446176).

Almost surely, 2^164478901 is an apocalyptic number.

It is an amenable number.

164478901 is a deficient number, since it is larger than the sum of its proper divisors (5305803).

164478901 is an equidigital number, since it uses as much as digits as its factorization.

164478901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305802.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 164478901 is about 12824.9327873482. The cubic root of 164478901 is about 547.9026468953.

The spelling of 164478901 in words is "one hundred sixty-four million, four hundred seventy-eight thousand, nine hundred one".