72772819 has 4 divisors (see below), whose sum is σ = 83168944. Its totient is φ = 62376696.

The previous prime is 72772807. The next prime is 72772849. The reversal of 72772819 is 91827727.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72772819 is a prime.

It is a super-4 number, since 4×72772819⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72772849) 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, 5198052 + ... + 5198065.

It is an arithmetic number, because the mean of its divisors is an integer number (20792236).

Almost surely, 2^72772819 is an apocalyptic number.

72772819 is a deficient number, since it is larger than the sum of its proper divisors (10396125).

72772819 is a wasteful number, since it uses less digits than its factorization.

72772819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10396124.

The product of its digits is 98784, while the sum is 43.

The square root of 72772819 is about 8530.6986232078. The cubic root of 72772819 is about 417.4999227891.

The spelling of 72772819 in words is "seventy-two million, seven hundred seventy-two thousand, eight hundred nineteen".