401009617 has 4 divisors (see below), whose sum is σ = 424598436. Its totient is φ = 377420800.

The previous prime is 401009599. The next prime is 401009621. The reversal of 401009617 is 716900104.

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 244484496 + 156525121 = 15636^2 + 12511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401009617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401009627) 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, 11794384 + ... + 11794417.

It is an arithmetic number, because the mean of its divisors is an integer number (106149609).

Almost surely, 2^401009617 is an apocalyptic number.

It is an amenable number.

401009617 is a deficient number, since it is larger than the sum of its proper divisors (23588819).

401009617 is a wasteful number, since it uses less digits than its factorization.

401009617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23588818.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 401009617 is about 20025.2245180922. The cubic root of 401009617 is about 737.4256890366.

The spelling of 401009617 in words is "four hundred one million, nine thousand, six hundred seventeen".