71884987 has 2 divisors, whose sum is σ = 71884988. Its totient is φ = 71884986.

The previous prime is 71884979. The next prime is 71885003. The reversal of 71884987 is 78948817.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71884987 - 2³ = 71884979 is a prime.

It is not a weakly prime, because it can be changed into another prime (71884937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35942493 + 35942494.

It is an arithmetic number, because the mean of its divisors is an integer number (35942494).

Almost surely, 2^71884987 is an apocalyptic number.

71884987 is a deficient number, since it is larger than the sum of its proper divisors (1).

71884987 is an equidigital number, since it uses as much as digits as its factorization.

71884987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 52.

The square root of 71884987 is about 8478.5014595741. The cubic root of 71884987 is about 415.7951311107.

The spelling of 71884987 in words is "seventy-one million, eight hundred eighty-four thousand, nine hundred eighty-seven".