28737812237 has 2 divisors, whose sum is σ = 28737812238. Its totient is φ = 28737812236.

The previous prime is 28737812219. The next prime is 28737812287. The reversal of 28737812237 is 73221873782.

It is an a-pointer prime, because the next prime (28737812287) can be obtained adding 28737812237 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28429669321 + 308142916 = 168611^2 + 17554^2 .

It is a cyclic number.

It is not a de Polignac number, because 28737812237 - 2³² = 24442844941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28737812287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14368906118 + 14368906119.

It is an arithmetic number, because the mean of its divisors is an integer number (14368906119).

Almost surely, 2^28737812237 is an apocalyptic number.

It is an amenable number.

28737812237 is a deficient number, since it is larger than the sum of its proper divisors (1).

28737812237 is an equidigital number, since it uses as much as digits as its factorization.

28737812237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1580544, while the sum is 50.

The spelling of 28737812237 in words is "twenty-eight billion, seven hundred thirty-seven million, eight hundred twelve thousand, two hundred thirty-seven".