71389807 has 6 divisors (see below), whose sum is σ = 73767984. Its totient is φ = 69085980.

The previous prime is 71389789. The next prime is 71389841. The reversal of 71389807 is 70898317.

It is not a de Polignac number, because 71389807 - 2⁷ = 71389679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71389867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36183 + ... + 38104.

It is an arithmetic number, because the mean of its divisors is an integer number (12294664).

Almost surely, 2^71389807 is an apocalyptic number.

71389807 is a deficient number, since it is larger than the sum of its proper divisors (2378177).

71389807 is an equidigital number, since it uses as much as digits as its factorization.

71389807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74349 (or 74318 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 71389807 is about 8449.2489015297. The cubic root of 71389807 is about 414.8381950144.

The spelling of 71389807 in words is "seventy-one million, three hundred eighty-nine thousand, eight hundred seven".