811220377 has 8 divisors (see below), whose sum is σ = 885175200. Its totient is φ = 737300160.

The previous prime is 811220353. The next prime is 811220411. The reversal of 811220377 is 773022118.

811220377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 811220377 - 2¹¹ = 811218329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811220077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79249 + ... + 88897.

It is an arithmetic number, because the mean of its divisors is an integer number (110646900).

Almost surely, 2^811220377 is an apocalyptic number.

It is an amenable number.

811220377 is a deficient number, since it is larger than the sum of its proper divisors (73954823).

811220377 is a wasteful number, since it uses less digits than its factorization.

811220377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17303.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 811220377 is about 28481.9307105400. The cubic root of 811220377 is about 932.6376644143.

The spelling of 811220377 in words is "eight hundred eleven million, two hundred twenty thousand, three hundred seventy-seven".