28387097 has 2 divisors, whose sum is σ = 28387098. Its totient is φ = 28387096.

The previous prime is 28387091. The next prime is 28387111. The reversal of 28387097 is 79078382.

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., 20830096 + 7557001 = 4564^2 + 2749^2 .

It is a cyclic number.

It is not a de Polignac number, because 28387097 - 2⁴ = 28387081 is a prime.

It is not a weakly prime, because it can be changed into another prime (28387091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14193548 + 14193549.

It is an arithmetic number, because the mean of its divisors is an integer number (14193549).

Almost surely, 2^28387097 is an apocalyptic number.

It is an amenable number.

28387097 is a deficient number, since it is larger than the sum of its proper divisors (1).

28387097 is an equidigital number, since it uses as much as digits as its factorization.

28387097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 28387097 is about 5327.9542978520. The cubic root of 28387097 is about 305.0518482133.

The spelling of 28387097 in words is "twenty-eight million, three hundred eighty-seven thousand, ninety-seven".