820977962 has 16 divisors (see below), whose sum is σ = 1468582272. Its totient is φ = 336549840.

The previous prime is 820977953. The next prime is 820977977. The reversal of 820977962 is 269779028.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 820977962.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1274489 + ... + 1275132.

It is an arithmetic number, because the mean of its divisors is an integer number (91786392).

Almost surely, 2^820977962 is an apocalyptic number.

820977962 is a deficient number, since it is larger than the sum of its proper divisors (647604310).

820977962 is a wasteful number, since it uses less digits than its factorization.

820977962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2549653.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 820977962 is about 28652.7129954565. The cubic root of 820977962 is about 936.3621131896.

The spelling of 820977962 in words is "eight hundred twenty million, nine hundred seventy-seven thousand, nine hundred sixty-two".