72943641 has 24 divisors (see below), whose sum is σ = 111631520. Its totient is φ = 45769536.

The previous prime is 72943639. The next prime is 72943643. The reversal of 72943641 is 14634927.

72943641 is a `hidden beast` number, since 7 + 2 + 9 + 4 + 3 + 641 = 666.

It is an interprime number because it is at equal distance from previous prime (72943639) and next prime (72943643).

It is not a de Polignac number, because 72943641 - 2¹ = 72943639 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72943596 and 72943605.

It is not an unprimeable number, because it can be changed into a prime (72943643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26565 + ... + 29181.

Almost surely, 2^72943641 is an apocalyptic number.

It is an amenable number.

72943641 is a deficient number, since it is larger than the sum of its proper divisors (38687879).

72943641 is a wasteful number, since it uses less digits than its factorization.

72943641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805 (or 2802 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 72943641 is about 8540.7049474853. The cubic root of 72943641 is about 417.8263378938.

The spelling of 72943641 in words is "seventy-two million, nine hundred forty-three thousand, six hundred forty-one".