890884921 has 4 divisors (see below), whose sum is σ = 929619072. Its totient is φ = 852150772.

The previous prime is 890884909. The next prime is 890884933. The reversal of 890884921 is 129488098.

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 an interprime number because it is at equal distance from previous prime (890884909) and next prime (890884933).

It is a cyclic number.

It is not a de Polignac number, because 890884921 - 2¹¹ = 890882873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890885921) 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, 19367041 + ... + 19367086.

It is an arithmetic number, because the mean of its divisors is an integer number (232404768).

Almost surely, 2^890884921 is an apocalyptic number.

It is an amenable number.

890884921 is a deficient number, since it is larger than the sum of its proper divisors (38734151).

890884921 is a wasteful number, since it uses less digits than its factorization.

890884921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38734150.

The product of its (nonzero) digits is 331776, while the sum is 49.

The square root of 890884921 is about 29847.6954051732. The cubic root of 890884921 is about 962.2188696232.

The spelling of 890884921 in words is "eight hundred ninety million, eight hundred eighty-four thousand, nine hundred twenty-one".