72755447 has 2 divisors, whose sum is σ = 72755448. Its totient is φ = 72755446.

The previous prime is 72755413. The next prime is 72755467. The reversal of 72755447 is 74455727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72755447 - 2¹⁴ = 72739063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72755407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36377723 + 36377724.

It is an arithmetic number, because the mean of its divisors is an integer number (36377724).

Almost surely, 2^72755447 is an apocalyptic number.

72755447 is a deficient number, since it is larger than the sum of its proper divisors (1).

72755447 is an equidigital number, since it uses as much as digits as its factorization.

72755447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 274400, while the sum is 41.

The square root of 72755447 is about 8529.6803574343. The cubic root of 72755447 is about 417.4666989108.

The spelling of 72755447 in words is "seventy-two million, seven hundred fifty-five thousand, four hundred forty-seven".