1781607013 has 2 divisors, whose sum is σ = 1781607014. Its totient is φ = 1781607012.

The previous prime is 1781607007. The next prime is 1781607019. The reversal of 1781607013 is 3107061871.

It is a balanced prime because it is at equal distance from previous prime (1781607007) and next prime (1781607019).

It can be written as a sum of positive squares in only one way, i.e., 1099718244 + 681888769 = 33162^2 + 26113^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1781607013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1781607013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1781607019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890803506 + 890803507.

It is an arithmetic number, because the mean of its divisors is an integer number (890803507).

Almost surely, 2^1781607013 is an apocalyptic number.

It is an amenable number.

1781607013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1781607013 is an equidigital number, since it uses as much as digits as its factorization.

1781607013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 1781607013 is about 42209.0868534253. The cubic root of 1781607013 is about 1212.2828775923.

Adding to 1781607013 its reverse (3107061871), we get a palindrome (4888668884).

The spelling of 1781607013 in words is "one billion, seven hundred eighty-one million, six hundred seven thousand, thirteen".