1612405213 has 2 divisors, whose sum is σ = 1612405214. Its totient is φ = 1612405212.

The previous prime is 1612405187. The next prime is 1612405321. The reversal of 1612405213 is 3125042161.

It is a happy number.

Together with next prime (1612405321) 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., 1608571449 + 3833764 = 40107^2 + 1958^2 .

It is an emirp because it is prime and its reverse (3125042161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1612405213 - 2⁵ = 1612405181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1612405913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806202606 + 806202607.

It is an arithmetic number, because the mean of its divisors is an integer number (806202607).

Almost surely, 2^1612405213 is an apocalyptic number.

It is an amenable number.

1612405213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612405213 is an equidigital number, since it uses as much as digits as its factorization.

1612405213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1612405213 is about 40154.7657570057. The cubic root of 1612405213 is about 1172.6220719326.

Adding to 1612405213 its reverse (3125042161), we get a palindrome (4737447374).

The spelling of 1612405213 in words is "one billion, six hundred twelve million, four hundred five thousand, two hundred thirteen".