72841939 has 4 divisors (see below), whose sum is σ = 75353760. Its totient is φ = 70330120.

The previous prime is 72841927. The next prime is 72841969. The reversal of 72841939 is 93914827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72841939 - 2¹¹ = 72839891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72841895 and 72841904.

It is not an unprimeable number, because it can be changed into a prime (72841919) 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, 1255867 + ... + 1255924.

It is an arithmetic number, because the mean of its divisors is an integer number (18838440).

Almost surely, 2^72841939 is an apocalyptic number.

72841939 is a deficient number, since it is larger than the sum of its proper divisors (2511821).

72841939 is a wasteful number, since it uses less digits than its factorization.

72841939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511820.

The product of its digits is 108864, while the sum is 43.

The square root of 72841939 is about 8534.7489125340. The cubic root of 72841939 is about 417.6320621580.

The spelling of 72841939 in words is "seventy-two million, eight hundred forty-one thousand, nine hundred thirty-nine".