561372737 has 2 divisors, whose sum is σ = 561372738. Its totient is φ = 561372736.

The previous prime is 561372719. The next prime is 561372743. The reversal of 561372737 is 737273165.

561372737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 507555841 + 53816896 = 22529^2 + 7336^2 .

It is a cyclic number.

It is not a de Polignac number, because 561372737 - 2⁶ = 561372673 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 561372694 and 561372703.

It is not a weakly prime, because it can be changed into another prime (561372037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280686368 + 280686369.

It is an arithmetic number, because the mean of its divisors is an integer number (280686369).

Almost surely, 2^561372737 is an apocalyptic number.

It is an amenable number.

561372737 is a deficient number, since it is larger than the sum of its proper divisors (1).

561372737 is an equidigital number, since it uses as much as digits as its factorization.

561372737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185220, while the sum is 41.

The square root of 561372737 is about 23693.3057423400. The cubic root of 561372737 is about 824.9300152449.

The spelling of 561372737 in words is "five hundred sixty-one million, three hundred seventy-two thousand, seven hundred thirty-seven".