138983587 has 2 divisors, whose sum is σ = 138983588. Its totient is φ = 138983586.

The previous prime is 138983567. The next prime is 138983597. The reversal of 138983587 is 785389831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138983587 is a prime.

It is a super-3 number, since 3×138983587³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (138983567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69491793 + 69491794.

It is an arithmetic number, because the mean of its divisors is an integer number (69491794).

Almost surely, 2^138983587 is an apocalyptic number.

138983587 is a deficient number, since it is larger than the sum of its proper divisors (1).

138983587 is an equidigital number, since it uses as much as digits as its factorization.

138983587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 52.

The square root of 138983587 is about 11789.1300357575. The cubic root of 138983587 is about 517.9897572052.

The spelling of 138983587 in words is "one hundred thirty-eight million, nine hundred eighty-three thousand, five hundred eighty-seven".