561064237 has 4 divisors (see below), whose sum is σ = 566307936. Its totient is φ = 555820540.

The previous prime is 561064193. The next prime is 561064249. The reversal of 561064237 is 732460165.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 561064237 - 2⁷ = 561064109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561064937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2621689 + ... + 2621902.

It is an arithmetic number, because the mean of its divisors is an integer number (141576984).

Almost surely, 2^561064237 is an apocalyptic number.

It is an amenable number.

561064237 is a deficient number, since it is larger than the sum of its proper divisors (5243699).

561064237 is a wasteful number, since it uses less digits than its factorization.

561064237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243698.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 561064237 is about 23686.7945699708. The cubic root of 561064237 is about 824.7788752950.

The spelling of 561064237 in words is "five hundred sixty-one million, sixty-four thousand, two hundred thirty-seven".