72968045 has 4 divisors (see below), whose sum is σ = 87561660. Its totient is φ = 58374432.

The previous prime is 72968023. The next prime is 72968047. The reversal of 72968045 is 54086927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54086927 = 6133 ⋅8819.

It can be written as a sum of positive squares in 2 ways, for example, as 51466276 + 21501769 = 7174^2 + 4637^2 .

It is a cyclic number.

It is not a de Polignac number, because 72968045 - 2⁸ = 72967789 is a prime.

It is a super-2 number, since 2×72968045² = 10648671182244050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72967993 and 72968011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72968047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7296800 + ... + 7296809.

It is an arithmetic number, because the mean of its divisors is an integer number (21890415).

Almost surely, 2^72968045 is an apocalyptic number.

It is an amenable number.

72968045 is a deficient number, since it is larger than the sum of its proper divisors (14593615).

72968045 is a wasteful number, since it uses less digits than its factorization.

72968045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14593614.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 72968045 is about 8542.1335156974. The cubic root of 72968045 is about 417.8729286447.

The spelling of 72968045 in words is "seventy-two million, nine hundred sixty-eight thousand, forty-five".