28237313009 has 2 divisors, whose sum is σ = 28237313010. Its totient is φ = 28237313008.

The previous prime is 28237312997. The next prime is 28237313033. The reversal of 28237313009 is 90031373282.

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., 19328784784 + 8908528225 = 139028^2 + 94385^2 .

It is a cyclic number.

It is not a de Polignac number, because 28237313009 - 2⁴ = 28237312993 is a prime.

It is a super-3 number, since 3×28237313009³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (28237313609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14118656504 + 14118656505.

It is an arithmetic number, because the mean of its divisors is an integer number (14118656505).

Almost surely, 2^28237313009 is an apocalyptic number.

It is an amenable number.

28237313009 is a deficient number, since it is larger than the sum of its proper divisors (1).

28237313009 is an equidigital number, since it uses as much as digits as its factorization.

28237313009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 28237313009 in words is "twenty-eight billion, two hundred thirty-seven million, three hundred thirteen thousand, nine".