71272843 has 2 divisors, whose sum is σ = 71272844. Its totient is φ = 71272842.

The previous prime is 71272793. The next prime is 71272849. The reversal of 71272843 is 34827217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71272843 - 2²⁵ = 37718411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71272799 and 71272808.

It is not a weakly prime, because it can be changed into another prime (71272849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35636421 + 35636422.

It is an arithmetic number, because the mean of its divisors is an integer number (35636422).

Almost surely, 2^71272843 is an apocalyptic number.

71272843 is a deficient number, since it is larger than the sum of its proper divisors (1).

71272843 is an equidigital number, since it uses as much as digits as its factorization.

71272843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 71272843 is about 8442.3245021736. The cubic root of 71272843 is about 414.6115162601.

The spelling of 71272843 in words is "seventy-one million, two hundred seventy-two thousand, eight hundred forty-three".