71294987 has 2 divisors, whose sum is σ = 71294988. Its totient is φ = 71294986.

The previous prime is 71294983. The next prime is 71295013. The reversal of 71294987 is 78949217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71294987 - 2² = 71294983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71294981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35647493 + 35647494.

It is an arithmetic number, because the mean of its divisors is an integer number (35647494).

Almost surely, 2^71294987 is an apocalyptic number.

71294987 is a deficient number, since it is larger than the sum of its proper divisors (1).

71294987 is an equidigital number, since it uses as much as digits as its factorization.

71294987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 71294987 is about 8443.6358874599. The cubic root of 71294987 is about 414.6544508308.

The spelling of 71294987 in words is "seventy-one million, two hundred ninety-four thousand, nine hundred eighty-seven".