71500823 has 2 divisors, whose sum is σ = 71500824. Its totient is φ = 71500822.

The previous prime is 71500817. The next prime is 71500831. The reversal of 71500823 is 32800517.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71500823 - 2⁸ = 71500567 is a prime.

It is a super-2 number, since 2×71500823² = 10224735379354658, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 71500792 and 71500801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71500423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35750411 + 35750412.

It is an arithmetic number, because the mean of its divisors is an integer number (35750412).

Almost surely, 2^71500823 is an apocalyptic number.

71500823 is a deficient number, since it is larger than the sum of its proper divisors (1).

71500823 is an equidigital number, since it uses as much as digits as its factorization.

71500823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 71500823 is about 8455.8159275140. The cubic root of 71500823 is about 415.0531175054.

The spelling of 71500823 in words is "seventy-one million, five hundred thousand, eight hundred twenty-three".