72043577 has 2 divisors, whose sum is σ = 72043578. Its totient is φ = 72043576.

The previous prime is 72043541. The next prime is 72043591. The reversal of 72043577 is 77534027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56235001 + 15808576 = 7499^2 + 3976^2 .

It is a cyclic number.

It is not a de Polignac number, because 72043577 - 2⁶ = 72043513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72043507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36021788 + 36021789.

It is an arithmetic number, because the mean of its divisors is an integer number (36021789).

Almost surely, 2^72043577 is an apocalyptic number.

It is an amenable number.

72043577 is a deficient number, since it is larger than the sum of its proper divisors (1).

72043577 is an equidigital number, since it uses as much as digits as its factorization.

72043577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 72043577 is about 8487.8487851752. The cubic root of 72043577 is about 416.1006771399.

The spelling of 72043577 in words is "seventy-two million, forty-three thousand, five hundred seventy-seven".