71417989 has 2 divisors, whose sum is σ = 71417990. Its totient is φ = 71417988.

The previous prime is 71417971. The next prime is 71418031. The reversal of 71417989 is 98971417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71115489 + 302500 = 8433^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 71417989 - 2⁷ = 71417861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71417939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35708994 + 35708995.

It is an arithmetic number, because the mean of its divisors is an integer number (35708995).

Almost surely, 2^71417989 is an apocalyptic number.

It is an amenable number.

71417989 is a deficient number, since it is larger than the sum of its proper divisors (1).

71417989 is an equidigital number, since it uses as much as digits as its factorization.

71417989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 46.

The square root of 71417989 is about 8450.9164591777. The cubic root of 71417989 is about 414.8927753178.

The spelling of 71417989 in words is "seventy-one million, four hundred seventeen thousand, nine hundred eighty-nine".