72307843 has 2 divisors, whose sum is σ = 72307844. Its totient is φ = 72307842.

The previous prime is 72307799. The next prime is 72307849. The reversal of 72307843 is 34870327.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72307843 - 2¹⁷ = 72176771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72307799 and 72307808.

It is not a weakly prime, because it can be changed into another prime (72307849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36153921 + 36153922.

It is an arithmetic number, because the mean of its divisors is an integer number (36153922).

Almost surely, 2^72307843 is an apocalyptic number.

72307843 is a deficient number, since it is larger than the sum of its proper divisors (1).

72307843 is an equidigital number, since it uses as much as digits as its factorization.

72307843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 72307843 is about 8503.4018486721. The cubic root of 72307843 is about 416.6088283095.

The spelling of 72307843 in words is "seventy-two million, three hundred seven thousand, eight hundred forty-three".