1581096137 has 2 divisors, whose sum is σ = 1581096138. Its totient is φ = 1581096136.

The previous prime is 1581096119. The next prime is 1581096151. The reversal of 1581096137 is 7316901851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050991561 + 530104576 = 32419^2 + 23024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1581096137 - 2⁶ = 1581096073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1581096094 and 1581096103.

It is not a weakly prime, because it can be changed into another prime (1581099137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790548068 + 790548069.

It is an arithmetic number, because the mean of its divisors is an integer number (790548069).

Almost surely, 2^1581096137 is an apocalyptic number.

It is an amenable number.

1581096137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1581096137 is an equidigital number, since it uses as much as digits as its factorization.

1581096137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 1581096137 is about 39762.9995976159. Note that the first 3 decimals coincide. The cubic root of 1581096137 is about 1164.9825651452.

Adding to 1581096137 its reverse (7316901851), we get a palindrome (8897997988).

The spelling of 1581096137 in words is "one billion, five hundred eighty-one million, ninety-six thousand, one hundred thirty-seven".