1780612013 has 4 divisors (see below), whose sum is σ = 1828736700. Its totient is φ = 1732487328.

The previous prime is 1780611997. The next prime is 1780612019. The reversal of 1780612013 is 3102160871.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1425591049 + 355020964 = 37757^2 + 18842^2 .

It is a cyclic number.

It is not a de Polignac number, because 1780612013 - 2⁴ = 1780611997 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 (1780612019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24062288 + ... + 24062361.

It is an arithmetic number, because the mean of its divisors is an integer number (457184175).

Almost surely, 2^1780612013 is an apocalyptic number.

It is an amenable number.

1780612013 is a deficient number, since it is larger than the sum of its proper divisors (48124687).

1780612013 is an equidigital number, since it uses as much as digits as its factorization.

1780612013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48124686.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1780612013 is about 42197.2986457664. The cubic root of 1780612013 is about 1212.0571551450.

Adding to 1780612013 its reverse (3102160871), we get a palindrome (4882772884).

The spelling of 1780612013 in words is "one billion, seven hundred eighty million, six hundred twelve thousand, thirteen".