820763377 has 12 divisors (see below), whose sum is σ = 956946096. Its totient is φ = 701904840.

The previous prime is 820763329. The next prime is 820763389. The reversal of 820763377 is 773367028.

It is not a de Polignac number, because 820763377 - 2²³ = 812374769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820763327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2802 + ... + 40612.

It is an arithmetic number, because the mean of its divisors is an integer number (79745508).

Almost surely, 2^820763377 is an apocalyptic number.

It is an amenable number.

820763377 is a deficient number, since it is larger than the sum of its proper divisors (136182719).

820763377 is a wasteful number, since it uses less digits than its factorization.

820763377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38268 (or 38261 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 43.

The square root of 820763377 is about 28648.9681664105. The cubic root of 820763377 is about 936.2805248149.

The spelling of 820763377 in words is "eight hundred twenty million, seven hundred sixty-three thousand, three hundred seventy-seven".