72705441 has 4 divisors (see below), whose sum is σ = 96940592. Its totient is φ = 48470292.

The previous prime is 72705403. The next prime is 72705449. The reversal of 72705441 is 14450727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14450727 = 3 ⋅4816909.

It is not a de Polignac number, because 72705441 - 2⁶ = 72705377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72705399 and 72705408.

It is not an unprimeable number, because it can be changed into a prime (72705449) 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, 12117571 + ... + 12117576.

It is an arithmetic number, because the mean of its divisors is an integer number (24235148).

Almost surely, 2^72705441 is an apocalyptic number.

It is an amenable number.

72705441 is a deficient number, since it is larger than the sum of its proper divisors (24235151).

72705441 is a wasteful number, since it uses less digits than its factorization.

72705441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24235150.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 72705441 is about 8526.7485596797. The cubic root of 72705441 is about 417.3710331098.

The spelling of 72705441 in words is "seventy-two million, seven hundred five thousand, four hundred forty-one".