1337220613 has 2 divisors, whose sum is σ = 1337220614. Its totient is φ = 1337220612.

The previous prime is 1337220587. The next prime is 1337220631. The reversal of 1337220613 is 3160227331.

1337220613 = 25857² + 25858².

Together with next prime (1337220631) 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., 668636164 + 668584449 = 25858^2 + 25857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1337220613 - 2²⁵ = 1303666181 is a prime.

It is a super-4 number, since 4×1337220613⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1337220683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668610306 + 668610307.

It is an arithmetic number, because the mean of its divisors is an integer number (668610307).

Almost surely, 2^1337220613 is an apocalyptic number.

1337220613 is the 25858-th centered square number.

It is an amenable number.

1337220613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1337220613 is an equidigital number, since it uses as much as digits as its factorization.

1337220613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 1337220613 is about 36568.0271958989. The cubic root of 1337220613 is about 1101.7110047158.

Adding to 1337220613 its reverse (3160227331), we get a palindrome (4497447944).

The spelling of 1337220613 in words is "one billion, three hundred thirty-seven million, two hundred twenty thousand, six hundred thirteen".