72969293 has 2 divisors, whose sum is σ = 72969294. Its totient is φ = 72969292.

The previous prime is 72969289. The next prime is 72969331. The reversal of 72969293 is 39296927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63648484 + 9320809 = 7978^2 + 3053^2 .

It is a cyclic number.

It is not a de Polignac number, because 72969293 - 2² = 72969289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72969203) 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, 36484646 + 36484647.

It is an arithmetic number, because the mean of its divisors is an integer number (36484647).

Almost surely, 2^72969293 is an apocalyptic number.

It is an amenable number.

72969293 is a deficient number, since it is larger than the sum of its proper divisors (1).

72969293 is an equidigital number, since it uses as much as digits as its factorization.

72969293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 47.

The square root of 72969293 is about 8542.2065650510. The cubic root of 72969293 is about 417.8753109772.

The spelling of 72969293 in words is "seventy-two million, nine hundred sixty-nine thousand, two hundred ninety-three".