561379 has 16 divisors (see below), whose sum is σ = 716800. Its totient is φ = 427680.

The previous prime is 561377. The next prime is 561389. The reversal of 561379 is 973165.

It is a cyclic number.

It is not a de Polignac number, because 561379 - 2¹ = 561377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 561379.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561373) 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, 2722 + ... + 2920.

It is an arithmetic number, because the mean of its divisors is an integer number (44800).

2⁵⁶¹³⁷⁹ is an apocalyptic number.

561379 is a deficient number, since it is larger than the sum of its proper divisors (155421).

561379 is a wasteful number, since it uses less digits than its factorization.

561379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250.

The product of its digits is 5670, while the sum is 31.

The square root of 561379 is about 749.2522939571. The cubic root of 561379 is about 82.4933083033.

The spelling of 561379 in words is "five hundred sixty-one thousand, three hundred seventy-nine".