1319020061 has 4 divisors (see below), whose sum is σ = 1351191324. Its totient is φ = 1286848800.

The previous prime is 1319020057. The next prime is 1319020081. The reversal of 1319020061 is 1600209131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1600209131 = 41 ⋅39029491.

It can be written as a sum of positive squares in 2 ways, for example, as 424112836 + 894907225 = 20594^2 + 29915^2 .

It is a cyclic number.

It is not a de Polignac number, because 1319020061 - 2² = 1319020057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1319020081) 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 in 3 ways as a sum of consecutive naturals, for example, 16085570 + ... + 16085651.

It is an arithmetic number, because the mean of its divisors is an integer number (337797831).

Almost surely, 2^1319020061 is an apocalyptic number.

It is an amenable number.

1319020061 is a deficient number, since it is larger than the sum of its proper divisors (32171263).

1319020061 is an equidigital number, since it uses as much as digits as its factorization.

1319020061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32171262.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1319020061 is about 36318.3157786811. The cubic root of 1319020061 is about 1096.6897899595.

Adding to 1319020061 its reverse (1600209131), we get a palindrome (2919229192).

The spelling of 1319020061 in words is "one billion, three hundred nineteen million, twenty thousand, sixty-one".