1612345513 has 2 divisors, whose sum is σ = 1612345514. Its totient is φ = 1612345512.

The previous prime is 1612345487. The next prime is 1612345531. The reversal of 1612345513 is 3155432161.

Together with next prime (1612345531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1612183104 + 162409 = 40152^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612345513 - 2²¹ = 1610248361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1612345013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806172756 + 806172757.

It is an arithmetic number, because the mean of its divisors is an integer number (806172757).

Almost surely, 2^1612345513 is an apocalyptic number.

It is an amenable number.

1612345513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612345513 is an equidigital number, since it uses as much as digits as its factorization.

1612345513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 1612345513 is about 40154.0223763448. The cubic root of 1612345513 is about 1172.6075994743.

Adding to 1612345513 its reverse (3155432161), we get a palindrome (4767777674).

The spelling of 1612345513 in words is "one billion, six hundred twelve million, three hundred forty-five thousand, five hundred thirteen".