7287099581 has 2 divisors, whose sum is σ = 7287099582. Its totient is φ = 7287099580.

The previous prime is 7287099563. The next prime is 7287099629. The reversal of 7287099581 is 1859907827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6737947225 + 549152356 = 82085^2 + 23434^2 .

It is an emirp because it is prime and its reverse (1859907827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7287099581 - 2¹⁴ = 7287083197 is a prime.

It is a super-2 number, since 2×7287099581² (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 (7287099511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3643549790 + 3643549791.

It is an arithmetic number, because the mean of its divisors is an integer number (3643549791).

Almost surely, 2^7287099581 is an apocalyptic number.

It is an amenable number.

7287099581 is a deficient number, since it is larger than the sum of its proper divisors (1).

7287099581 is an equidigital number, since it uses as much as digits as its factorization.

7287099581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 56.

The square root of 7287099581 is about 85364.5100788378. The cubic root of 7287099581 is about 1938.7340361641.

The spelling of 7287099581 in words is "seven billion, two hundred eighty-seven million, ninety-nine thousand, five hundred eighty-one".