72453361 has 2 divisors, whose sum is σ = 72453362. Its totient is φ = 72453360.

The previous prime is 72453347. The next prime is 72453383. The reversal of 72453361 is 16335427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 118336 = 8505^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 72453361 - 2⁷ = 72453233 is a prime.

It is not a weakly prime, because it can be changed into another prime (72453301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36226680 + 36226681.

It is an arithmetic number, because the mean of its divisors is an integer number (36226681).

Almost surely, 2^72453361 is an apocalyptic number.

It is an amenable number.

72453361 is a deficient number, since it is larger than the sum of its proper divisors (1).

72453361 is an equidigital number, since it uses as much as digits as its factorization.

72453361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 72453361 is about 8511.9540059848. The cubic root of 72453361 is about 416.8881131844. Note that the first 3 decimals are identical.

Adding to 72453361 its reverse (16335427), we get a palindrome (88788788).

The spelling of 72453361 in words is "seventy-two million, four hundred fifty-three thousand, three hundred sixty-one".