802646991 has 6 divisors (see below), whose sum is σ = 1159379000. Its totient is φ = 535097988.

The previous prime is 802646953. The next prime is 802647011. The reversal of 802646991 is 199646208.

It is a happy number.

802646991 is a `hidden beast` number, since 80 + 26 + 469 + 91 = 666.

It is not a de Polignac number, because 802646991 - 2⁶ = 802646927 is a prime.

It is a super-2 number, since 2×802646991² = 1288484384322708162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802646951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44591491 + ... + 44591508.

Almost surely, 2^802646991 is an apocalyptic number.

802646991 is a deficient number, since it is larger than the sum of its proper divisors (356732009).

802646991 is a wasteful number, since it uses less digits than its factorization.

802646991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89183005 (or 89183002 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 802646991 is about 28331.0252373612. The cubic root of 802646991 is about 929.3404932280.

The spelling of 802646991 in words is "eight hundred two million, six hundred forty-six thousand, nine hundred ninety-one".