1284213613 has 2 divisors, whose sum is σ = 1284213614. Its totient is φ = 1284213612.

The previous prime is 1284213587. The next prime is 1284213659. The reversal of 1284213613 is 3163124821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 920090889 + 364122724 = 30333^2 + 19082^2 .

It is a cyclic number.

It is not a de Polignac number, because 1284213613 - 2²¹ = 1282116461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284213013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642106806 + 642106807.

It is an arithmetic number, because the mean of its divisors is an integer number (642106807).

Almost surely, 2^1284213613 is an apocalyptic number.

It is an amenable number.

1284213613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284213613 is an equidigital number, since it uses as much as digits as its factorization.

1284213613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 1284213613 is about 35835.9262891306. The cubic root of 1284213613 is about 1086.9571485068.

The spelling of 1284213613 in words is "one billion, two hundred eighty-four million, two hundred thirteen thousand, six hundred thirteen".