138098287 has 2 divisors, whose sum is σ = 138098288. Its totient is φ = 138098286.

The previous prime is 138098201. The next prime is 138098297. The reversal of 138098287 is 782890831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138098287 - 2¹¹ = 138096239 is a prime.

It is a super-2 number, since 2×138098287² = 38142273744668738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138098297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69049143 + 69049144.

It is an arithmetic number, because the mean of its divisors is an integer number (69049144).

Almost surely, 2^138098287 is an apocalyptic number.

138098287 is a deficient number, since it is larger than the sum of its proper divisors (1).

138098287 is an equidigital number, since it uses as much as digits as its factorization.

138098287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 138098287 is about 11751.5227523926. The cubic root of 138098287 is about 516.8875803589.

It can be divided in two parts, 13 and 8098287, that added together give a triangular number (8098300 = T₄₀₂₄).

The spelling of 138098287 in words is "one hundred thirty-eight million, ninety-eight thousand, two hundred eighty-seven".