1561363147 has 4 divisors (see below), whose sum is σ = 1653208056. Its totient is φ = 1469518240.

The previous prime is 1561363127. The next prime is 1561363163. The reversal of 1561363147 is 7413631651.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1561363147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1561363127) 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, 45922429 + ... + 45922462.

It is an arithmetic number, because the mean of its divisors is an integer number (413302014).

Almost surely, 2^1561363147 is an apocalyptic number.

1561363147 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1561363147 is a deficient number, since it is larger than the sum of its proper divisors (91844909).

1561363147 is an equidigital number, since it uses as much as digits as its factorization.

1561363147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91844908.

The product of its digits is 45360, while the sum is 37.

The square root of 1561363147 is about 39514.0879560695. The cubic root of 1561363147 is about 1160.1157105641.

Adding to 1561363147 its reverse (7413631651), we get a palindrome (8974994798).

The spelling of 1561363147 in words is "one billion, five hundred sixty-one million, three hundred sixty-three thousand, one hundred forty-seven".