72910641 has 4 divisors (see below), whose sum is σ = 97214192. Its totient is φ = 48607092.

The previous prime is 72910633. The next prime is 72910661. The reversal of 72910641 is 14601927.

It is a happy number.

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: 14601927 = 3 ⋅4867309.

It is not a de Polignac number, because 72910641 - 2³ = 72910633 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 = 72910599 and 72910608.

It is not an unprimeable number, because it can be changed into a prime (72910661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12151771 + ... + 12151776.

It is an arithmetic number, because the mean of its divisors is an integer number (24303548).

Almost surely, 2^72910641 is an apocalyptic number.

It is an amenable number.

72910641 is a deficient number, since it is larger than the sum of its proper divisors (24303551).

72910641 is a wasteful number, since it uses less digits than its factorization.

72910641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24303550.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 72910641 is about 8538.7728040978. The cubic root of 72910641 is about 417.7633196111.

The spelling of 72910641 in words is "seventy-two million, nine hundred ten thousand, six hundred forty-one".