1172440813 has 2 divisors, whose sum is σ = 1172440814. Its totient is φ = 1172440812.

The previous prime is 1172440799. The next prime is 1172440831. The reversal of 1172440813 is 3180442711.

Together with next prime (1172440831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097133129 + 75307684 = 33123^2 + 8678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1172440813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1172440873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586220406 + 586220407.

It is an arithmetic number, because the mean of its divisors is an integer number (586220407).

Almost surely, 2^1172440813 is an apocalyptic number.

It is an amenable number.

1172440813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172440813 is an equidigital number, since it uses as much as digits as its factorization.

1172440813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1172440813 is about 34240.9230745901. The cubic root of 1172440813 is about 1054.4604843851.

The spelling of 1172440813 in words is "one billion, one hundred seventy-two million, four hundred forty thousand, eight hundred thirteen".