7513893481 has 2 divisors, whose sum is σ = 7513893482. Its totient is φ = 7513893480.

The previous prime is 7513893479. The next prime is 7513893557. The reversal of 7513893481 is 1843983157.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7493499225 + 20394256 = 86565^2 + 4516^2 .

It is an emirp because it is prime and its reverse (1843983157) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7513893481 - 2¹ = 7513893479 is a prime.

It is a super-2 number, since 2×7513893481² (a number of 21 digits) contains 22 as substring.

Together with 7513893479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7513893451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3756946740 + 3756946741.

It is an arithmetic number, because the mean of its divisors is an integer number (3756946741).

Almost surely, 2^7513893481 is an apocalyptic number.

It is an amenable number.

7513893481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7513893481 is an equidigital number, since it uses as much as digits as its factorization.

7513893481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The square root of 7513893481 is about 86682.7173143528. The cubic root of 7513893481 is about 1958.6417669807.

The spelling of 7513893481 in words is "seven billion, five hundred thirteen million, eight hundred ninety-three thousand, four hundred eighty-one".