28013137 has 2 divisors, whose sum is σ = 28013138. Its totient is φ = 28013136.

The previous prime is 28013131. The next prime is 28013143. The reversal of 28013137 is 73131082.

It is a balanced prime because it is at equal distance from previous prime (28013131) and next prime (28013143).

It can be written as a sum of positive squares in only one way, i.e., 22810176 + 5202961 = 4776^2 + 2281^2 .

It is a cyclic number.

It is not a de Polignac number, because 28013137 - 2⁷ = 28013009 is a prime.

It is not a weakly prime, because it can be changed into another prime (28013131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14006568 + 14006569.

It is an arithmetic number, because the mean of its divisors is an integer number (14006569).

Almost surely, 2^28013137 is an apocalyptic number.

It is an amenable number.

28013137 is a deficient number, since it is larger than the sum of its proper divisors (1).

28013137 is an equidigital number, since it uses as much as digits as its factorization.

28013137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 28013137 is about 5292.7438063825. The cubic root of 28013137 is about 303.7063798449.

The spelling of 28013137 in words is "twenty-eight million, thirteen thousand, one hundred thirty-seven".