1613012281 has 2 divisors, whose sum is σ = 1613012282. Its totient is φ = 1613012280.

The previous prime is 1613012263. The next prime is 1613012329. The reversal of 1613012281 is 1822103161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 980942400 + 632069881 = 31320^2 + 25141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613012281 - 2⁵ = 1613012249 is a prime.

It is a super-2 number, since 2×1613012281² = 5203617237313645922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1613012221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806506140 + 806506141.

It is an arithmetic number, because the mean of its divisors is an integer number (806506141).

Almost surely, 2^1613012281 is an apocalyptic number.

It is an amenable number.

1613012281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613012281 is an equidigital number, since it uses as much as digits as its factorization.

1613012281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1613012281 is about 40162.3241483856. The cubic root of 1613012281 is about 1172.7692169163.

The spelling of 1613012281 in words is "one billion, six hundred thirteen million, twelve thousand, two hundred eighty-one".