890940961 has 4 divisors (see below), whose sum is σ = 919681024. Its totient is φ = 862200900.

The previous prime is 890940923. The next prime is 890940979. The reversal of 890940961 is 169049098.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 890940961 - 2¹³ = 890932769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890940361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14369985 + ... + 14370046.

It is an arithmetic number, because the mean of its divisors is an integer number (229920256).

Almost surely, 2^890940961 is an apocalyptic number.

It is an amenable number.

890940961 is a deficient number, since it is larger than the sum of its proper divisors (28740063).

890940961 is a wasteful number, since it uses less digits than its factorization.

890940961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28740062.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 890940961 is about 29848.6341563563. The cubic root of 890940961 is about 962.2390449244.

The spelling of 890940961 in words is "eight hundred ninety million, nine hundred forty thousand, nine hundred sixty-one".