72340843 has 2 divisors, whose sum is σ = 72340844. Its totient is φ = 72340842.

The previous prime is 72340817. The next prime is 72340859. The reversal of 72340843 is 34804327.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72340843 - 2⁵ = 72340811 is a prime.

It is not a weakly prime, because it can be changed into another prime (72340243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36170421 + 36170422.

It is an arithmetic number, because the mean of its divisors is an integer number (36170422).

Almost surely, 2^72340843 is an apocalyptic number.

72340843 is a deficient number, since it is larger than the sum of its proper divisors (1).

72340843 is an equidigital number, since it uses as much as digits as its factorization.

72340843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 72340843 is about 8505.3420272203. The cubic root of 72340843 is about 416.6721962644.

The spelling of 72340843 in words is "seventy-two million, three hundred forty thousand, eight hundred forty-three".