7581312373 has 2 divisors, whose sum is σ = 7581312374. Its totient is φ = 7581312372.

The previous prime is 7581312331. The next prime is 7581312383. The reversal of 7581312373 is 3732131857.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6796023844 + 785288529 = 82438^2 + 28023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7581312373 is a prime.

It is a super-2 number, since 2×7581312373² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7581312313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3790656186 + 3790656187.

It is an arithmetic number, because the mean of its divisors is an integer number (3790656187).

Almost surely, 2^7581312373 is an apocalyptic number.

It is an amenable number.

7581312373 is a deficient number, since it is larger than the sum of its proper divisors (1).

7581312373 is an equidigital number, since it uses as much as digits as its factorization.

7581312373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 7581312373 is about 87070.7320113940. The cubic root of 7581312373 is about 1964.4823463610.

It can be divided in two parts, 758 and 1312373, that added together give a palindrome (1313131).

The spelling of 7581312373 in words is "seven billion, five hundred eighty-one million, three hundred twelve thousand, three hundred seventy-three".