71503723 has 2 divisors, whose sum is σ = 71503724. Its totient is φ = 71503722.

The previous prime is 71503709. The next prime is 71503741. The reversal of 71503723 is 32730517.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71503723 - 2²⁵ = 37949291 is a prime.

It is a super-2 number, since 2×71503723² = 10225564805721458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71503691 and 71503700.

It is not a weakly prime, because it can be changed into another prime (71503703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35751861 + 35751862.

It is an arithmetic number, because the mean of its divisors is an integer number (35751862).

Almost surely, 2^71503723 is an apocalyptic number.

71503723 is a deficient number, since it is larger than the sum of its proper divisors (1).

71503723 is an equidigital number, since it uses as much as digits as its factorization.

71503723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 71503723 is about 8455.9874053832. The cubic root of 71503723 is about 415.0587288057.

The spelling of 71503723 in words is "seventy-one million, five hundred three thousand, seven hundred twenty-three".