401964089 has 4 divisors (see below), whose sum is σ = 402010356. Its totient is φ = 401917824.

The previous prime is 401964071. The next prime is 401964097. The reversal of 401964089 is 980469104.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 209670400 + 192293689 = 14480^2 + 13867^2 .

It is a cyclic number.

It is not a de Polignac number, because 401964089 - 2¹² = 401959993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (401964889) 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, 5744 + ... + 28929.

It is an arithmetic number, because the mean of its divisors is an integer number (100502589).

Almost surely, 2^401964089 is an apocalyptic number.

It is an amenable number.

401964089 is a deficient number, since it is larger than the sum of its proper divisors (46267).

401964089 is a wasteful number, since it uses less digits than its factorization.

401964089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46266.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 401964089 is about 20049.0420968185. The cubic root of 401964089 is about 738.0102922065.

The spelling of 401964089 in words is "four hundred one million, nine hundred sixty-four thousand, eighty-nine".