821490011 has 8 divisors (see below), whose sum is σ = 857693184. Its totient is φ = 785327400.

The previous prime is 821489971. The next prime is 821490013. The reversal of 821490011 is 110094128.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-821490011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (821490013) 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, 35720 + ... + 54026.

It is an arithmetic number, because the mean of its divisors is an integer number (107211648).

Almost surely, 2^821490011 is an apocalyptic number.

821490011 is a deficient number, since it is larger than the sum of its proper divisors (36203173).

821490011 is a wasteful number, since it uses less digits than its factorization.

821490011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20281.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 821490011 is about 28661.6470392055. The cubic root of 821490011 is about 936.5567443324.

The spelling of 821490011 in words is "eight hundred twenty-one million, four hundred ninety thousand, eleven".