72448969 has 2 divisors, whose sum is σ = 72448970. Its totient is φ = 72448968.

The previous prime is 72448967. The next prime is 72448993. The reversal of 72448969 is 96984427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67043344 + 5405625 = 8188^2 + 2325^2 .

It is a cyclic number.

It is not a de Polignac number, because 72448969 - 2¹ = 72448967 is a prime.

It is a super-2 number, since 2×72448969² = 10497706218325922, which contains 22 as substring.

Together with 72448967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72448967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36224484 + 36224485.

It is an arithmetic number, because the mean of its divisors is an integer number (36224485).

Almost surely, 2^72448969 is an apocalyptic number.

It is an amenable number.

72448969 is a deficient number, since it is larger than the sum of its proper divisors (1).

72448969 is an equidigital number, since it uses as much as digits as its factorization.

72448969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 72448969 is about 8511.6960119591. The cubic root of 72448969 is about 416.8796893304.

The spelling of 72448969 in words is "seventy-two million, four hundred forty-eight thousand, nine hundred sixty-nine".