820492075 has 12 divisors (see below), whose sum is σ = 1095672928. Its totient is φ = 605901600.

The previous prime is 820492031. The next prime is 820492081. The reversal of 820492075 is 570294028.

It is not a de Polignac number, because 820492075 - 2¹⁹ = 819967787 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1261971 + ... + 1262620.

Almost surely, 2^820492075 is an apocalyptic number.

820492075 is a deficient number, since it is larger than the sum of its proper divisors (275180853).

820492075 is a wasteful number, since it uses less digits than its factorization.

820492075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524614 (or 2524609 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 820492075 is about 28644.2328401373. The cubic root of 820492075 is about 936.1773514443.

The spelling of 820492075 in words is "eight hundred twenty million, four hundred ninety-two thousand, seventy-five".