72290741 has 2 divisors, whose sum is σ = 72290742. Its totient is φ = 72290740.

The previous prime is 72290723. The next prime is 72290809. The reversal of 72290741 is 14709227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71757841 + 532900 = 8471^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 72290741 - 2⁶ = 72290677 is a prime.

It is a super-3 number, since 3×72290741³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72290698 and 72290707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72290441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36145370 + 36145371.

It is an arithmetic number, because the mean of its divisors is an integer number (36145371).

Almost surely, 2^72290741 is an apocalyptic number.

It is an amenable number.

72290741 is a deficient number, since it is larger than the sum of its proper divisors (1).

72290741 is an equidigital number, since it uses as much as digits as its factorization.

72290741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 72290741 is about 8502.3961916627. The cubic root of 72290741 is about 416.5759807618.

Adding to 72290741 its reverse (14709227), we get a palindrome (86999968).

The spelling of 72290741 in words is "seventy-two million, two hundred ninety thousand, seven hundred forty-one".