821105970 has 32 divisors (see below), whose sum is σ = 1990977408. Its totient is φ = 216703488.

The previous prime is 821105947. The next prime is 821105993. The reversal of 821105970 is 79501128.

It is an interprime number because it is at equal distance from previous prime (821105947) and next prime (821105993).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138174 + ... + 143993.

It is an arithmetic number, because the mean of its divisors is an integer number (62218044).

Almost surely, 2^821105970 is an apocalyptic number.

821105970 is an abundant number, since it is smaller than the sum of its proper divisors (1169871438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

821105970 is a wasteful number, since it uses less digits than its factorization.

821105970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282274.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 821105970 is about 28654.9466933722. The cubic root of 821105970 is about 936.4107769450.

The spelling of 821105970 in words is "eight hundred twenty-one million, one hundred five thousand, nine hundred seventy".