561977 has 8 divisors (see below), whose sum is σ = 611520. Its totient is φ = 513360.

The previous prime is 561973. The next prime is 561983. The reversal of 561977 is 779165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561977 - 2² = 561973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1652 + ... + 1962.

It is an arithmetic number, because the mean of its divisors is an integer number (76440).

2⁵⁶¹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

561977 is a deficient number, since it is larger than the sum of its proper divisors (49543).

561977 is a wasteful number, since it uses less digits than its factorization.

561977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its digits is 13230, while the sum is 35.

The square root of 561977 is about 749.6512522500. The cubic root of 561977 is about 82.5225894677.

The spelling of 561977 in words is "five hundred sixty-one thousand, nine hundred seventy-seven".