1662367813 has 2 divisors, whose sum is σ = 1662367814. Its totient is φ = 1662367812.

The previous prime is 1662367799. The next prime is 1662367867. The reversal of 1662367813 is 3187632661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1248774244 + 413593569 = 35338^2 + 20337^2 .

It is an emirp because it is prime and its reverse (3187632661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1662367813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1662367813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662367613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831183906 + 831183907.

It is an arithmetic number, because the mean of its divisors is an integer number (831183907).

Almost surely, 2^1662367813 is an apocalyptic number.

It is an amenable number.

1662367813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662367813 is an equidigital number, since it uses as much as digits as its factorization.

1662367813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 1662367813 is about 40772.1450625301. The cubic root of 1662367813 is about 1184.6108528918.

The spelling of 1662367813 in words is "one billion, six hundred sixty-two million, three hundred sixty-seven thousand, eight hundred thirteen".