87139067 has 2 divisors, whose sum is σ = 87139068. Its totient is φ = 87139066.

The previous prime is 87139051. The next prime is 87139123. The reversal of 87139067 is 76093178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87139067 - 2⁴ = 87139051 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87139007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43569533 + 43569534.

It is an arithmetic number, because the mean of its divisors is an integer number (43569534).

Almost surely, 2^87139067 is an apocalyptic number.

87139067 is a deficient number, since it is larger than the sum of its proper divisors (1).

87139067 is an equidigital number, since it uses as much as digits as its factorization.

87139067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 87139067 is about 9334.8308501011. The cubic root of 87139067 is about 443.3407332261.

The spelling of 87139067 in words is "eighty-seven million, one hundred thirty-nine thousand, sixty-seven".