72423601 has 2 divisors, whose sum is σ = 72423602. Its totient is φ = 72423600.

The previous prime is 72423551. The next prime is 72423647. The reversal of 72423601 is 10632427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71656225 + 767376 = 8465^2 + 876^2 .

It is a cyclic number.

It is not a de Polignac number, because 72423601 - 2¹¹ = 72421553 is a prime.

It is equal to p_4252228 and since 72423601 and 4252228 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72423691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36211800 + 36211801.

It is an arithmetic number, because the mean of its divisors is an integer number (36211801).

Almost surely, 2^72423601 is an apocalyptic number.

It is an amenable number.

72423601 is a deficient number, since it is larger than the sum of its proper divisors (1).

72423601 is an equidigital number, since it uses as much as digits as its factorization.

72423601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 72423601 is about 8510.2056966915. The cubic root of 72423601 is about 416.8310268550.

The spelling of 72423601 in words is "seventy-two million, four hundred twenty-three thousand, six hundred one".