1244904613 has 2 divisors, whose sum is σ = 1244904614. Its totient is φ = 1244904612.

The previous prime is 1244904569. The next prime is 1244904629. The reversal of 1244904613 is 3164094421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1242351009 + 2553604 = 35247^2 + 1598^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244904613 - 2²⁹ = 708033701 is a prime.

It is a super-4 number, since 4×1244904613⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244904013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622452306 + 622452307.

It is an arithmetic number, because the mean of its divisors is an integer number (622452307).

Almost surely, 2^1244904613 is an apocalyptic number.

It is an amenable number.

1244904613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244904613 is an equidigital number, since it uses as much as digits as its factorization.

1244904613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1244904613 is about 35283.2058209001. The cubic root of 1244904613 is about 1075.7516612130.

The spelling of 1244904613 in words is "one billion, two hundred forty-four million, nine hundred four thousand, six hundred thirteen".