890804961 has 6 divisors (see below), whose sum is σ = 1286718290. Its totient is φ = 593869968.

The previous prime is 890804953. The next prime is 890804983. The reversal of 890804961 is 169408098.

890804961 is a `hidden beast` number, since 89 + 0 + 80 + 496 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 890664336 + 140625 = 29844^2 + 375^2 .

It is not a de Polignac number, because 890804961 - 2³ = 890804953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890804921) 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, 49489156 + ... + 49489173.

Almost surely, 2^890804961 is an apocalyptic number.

It is an amenable number.

890804961 is a deficient number, since it is larger than the sum of its proper divisors (395913329).

890804961 is a wasteful number, since it uses less digits than its factorization.

890804961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98978335 (or 98978332 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 890804961 is about 29846.3559082177. The cubic root of 890804961 is about 962.1900812725.

The spelling of 890804961 in words is "eight hundred ninety million, eight hundred four thousand, nine hundred sixty-one".