561137307 has 4 divisors (see below), whose sum is σ = 748183080. Its totient is φ = 374091536.

The previous prime is 561137299. The next prime is 561137329. The reversal of 561137307 is 703731165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561137307 - 2³ = 561137299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561137387) 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, 93522882 + ... + 93522887.

It is an arithmetic number, because the mean of its divisors is an integer number (187045770).

Almost surely, 2^561137307 is an apocalyptic number.

561137307 is a deficient number, since it is larger than the sum of its proper divisors (187045773).

561137307 is a wasteful number, since it uses less digits than its factorization.

561137307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187045772.

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 561137307 is about 23688.3369403595. The cubic root of 561137307 is about 824.8146786679.

The spelling of 561137307 in words is "five hundred sixty-one million, one hundred thirty-seven thousand, three hundred seven".