72847543 has 2 divisors, whose sum is σ = 72847544. Its totient is φ = 72847542.

The previous prime is 72847531. The next prime is 72847553. The reversal of 72847543 is 34574827.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72847543 is a prime.

It is a super-2 number, since 2×72847543² = 10613529042273698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72847496 and 72847505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72847553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36423771 + 36423772.

It is an arithmetic number, because the mean of its divisors is an integer number (36423772).

Almost surely, 2^72847543 is an apocalyptic number.

72847543 is a deficient number, since it is larger than the sum of its proper divisors (1).

72847543 is an equidigital number, since it uses as much as digits as its factorization.

72847543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 40.

The square root of 72847543 is about 8535.0772111329. The cubic root of 72847543 is about 417.6427718768.

The spelling of 72847543 in words is "seventy-two million, eight hundred forty-seven thousand, five hundred forty-three".