71489933 has 2 divisors, whose sum is σ = 71489934. Its totient is φ = 71489932.

The previous prime is 71489927. The next prime is 71489953. The reversal of 71489933 is 33998417.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44262409 + 27227524 = 6653^2 + 5218^2 .

It is an emirp because it is prime and its reverse (33998417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71489933 - 2⁴ = 71489917 is a prime.

It is a super-2 number, since 2×71489933² = 10221621040688978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71489953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35744966 + 35744967.

It is an arithmetic number, because the mean of its divisors is an integer number (35744967).

Almost surely, 2^71489933 is an apocalyptic number.

It is an amenable number.

71489933 is a deficient number, since it is larger than the sum of its proper divisors (1).

71489933 is an equidigital number, since it uses as much as digits as its factorization.

71489933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 71489933 is about 8455.1719675001. The cubic root of 71489933 is about 415.0320447506.

The spelling of 71489933 in words is "seventy-one million, four hundred eighty-nine thousand, nine hundred thirty-three".