71239087 has 2 divisors, whose sum is σ = 71239088. Its totient is φ = 71239086.

The previous prime is 71239081. The next prime is 71239121. The reversal of 71239087 is 78093217.

It is a weak prime.

It is an emirp because it is prime and its reverse (78093217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71239087 - 2³ = 71239079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71239081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35619543 + 35619544.

It is an arithmetic number, because the mean of its divisors is an integer number (35619544).

Almost surely, 2^71239087 is an apocalyptic number.

71239087 is a deficient number, since it is larger than the sum of its proper divisors (1).

71239087 is an equidigital number, since it uses as much as digits as its factorization.

71239087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 71239087 is about 8440.3250529823. The cubic root of 71239087 is about 414.5460502946.

The spelling of 71239087 in words is "seventy-one million, two hundred thirty-nine thousand, eighty-seven".