383561 has 4 divisors (see below), whose sum is σ = 390852. Its totient is φ = 376272.

The previous prime is 383557. The next prime is 383573. The reversal of 383561 is 165383.

383561 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

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 265225 + 118336 = 515^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 383561 - 2² = 383557 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 383561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383521) 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, 3566 + ... + 3671.

It is an arithmetic number, because the mean of its divisors is an integer number (97713).

2³⁸³⁵⁶¹ is an apocalyptic number.

It is an amenable number.

383561 is a deficient number, since it is larger than the sum of its proper divisors (7291).

383561 is an equidigital number, since it uses as much as digits as its factorization.

383561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7290.

The product of its digits is 2160, while the sum is 26.

The square root of 383561 is about 619.3230174957. The cubic root of 383561 is about 72.6571146812.

The spelling of 383561 in words is "three hundred eighty-three thousand, five hundred sixty-one".