71433309 has 12 divisors (see below), whose sum is σ = 96216576. Its totient is φ = 47138112.

The previous prime is 71433253. The next prime is 71433311. The reversal of 71433309 is 90333417.

It is not a de Polignac number, because 71433309 - 2⁸ = 71433053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71433319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164757 + ... + 165189.

It is an arithmetic number, because the mean of its divisors is an integer number (8018048).

Almost surely, 2^71433309 is an apocalyptic number.

It is an amenable number.

71433309 is a deficient number, since it is larger than the sum of its proper divisors (24783267).

71433309 is an equidigital number, since it uses as much as digits as its factorization.

71433309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 71433309 is about 8451.8228211434. The cubic root of 71433309 is about 414.9224396594.

The spelling of 71433309 in words is "seventy-one million, four hundred thirty-three thousand, three hundred nine".