1561488307 has 2 divisors, whose sum is σ = 1561488308. Its totient is φ = 1561488306.

The previous prime is 1561488293. The next prime is 1561488311. The reversal of 1561488307 is 7038841651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1561488307 - 2¹¹ = 1561486259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1561488317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780744153 + 780744154.

It is an arithmetic number, because the mean of its divisors is an integer number (780744154).

Almost surely, 2^1561488307 is an apocalyptic number.

1561488307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561488307 is an equidigital number, since it uses as much as digits as its factorization.

1561488307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 1561488307 is about 39515.6716632781. The cubic root of 1561488307 is about 1160.1467083075.

The spelling of 1561488307 in words is "one billion, five hundred sixty-one million, four hundred eighty-eight thousand, three hundred seven".