72777941 has 4 divisors (see below), whose sum is σ = 73971084. Its totient is φ = 71584800.

The previous prime is 72777931. The next prime is 72777953. The reversal of 72777941 is 14977727.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6355441 + 66422500 = 2521^2 + 8150^2 .

It is a cyclic number.

It is not a de Polignac number, because 72777941 - 2⁶ = 72777877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72777892 and 72777901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72777931) 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, 596480 + ... + 596601.

It is an arithmetic number, because the mean of its divisors is an integer number (18492771).

Almost surely, 2^72777941 is an apocalyptic number.

It is an amenable number.

72777941 is a deficient number, since it is larger than the sum of its proper divisors (1193143).

72777941 is a wasteful number, since it uses less digits than its factorization.

72777941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193142.

The product of its digits is 172872, while the sum is 44.

The square root of 72777941 is about 8530.9988278044. The cubic root of 72777941 is about 417.5097175837.

The spelling of 72777941 in words is "seventy-two million, seven hundred seventy-seven thousand, nine hundred forty-one".