320917641 has 16 divisors (see below), whose sum is σ = 467156160. Its totient is φ = 194342720.

The previous prime is 320917631. The next prime is 320917651. The reversal of 320917641 is 146719023.

It is an interprime number because it is at equal distance from previous prime (320917631) and next prime (320917651).

It is not a de Polignac number, because 320917641 - 2¹⁵ = 320884873 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (320917601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50215 + ... + 56243.

It is an arithmetic number, because the mean of its divisors is an integer number (29197260).

Almost surely, 2^320917641 is an apocalyptic number.

It is an amenable number.

320917641 is a deficient number, since it is larger than the sum of its proper divisors (146238519).

320917641 is a wasteful number, since it uses less digits than its factorization.

320917641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7656.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 320917641 is about 17914.1743041648. The cubic root of 320917641 is about 684.6435647188.

The spelling of 320917641 in words is "three hundred twenty million, nine hundred seventeen thousand, six hundred forty-one".