1030816921 has 8 divisors (see below), whose sum is σ = 1085690304. Its totient is φ = 976781520.

The previous prime is 1030816903. The next prime is 1030816933. The reversal of 1030816921 is 1296180301.

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

It is a cyclic number.

It is not a de Polignac number, because 1030816921 - 2⁵ = 1030816889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1030816961) 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, 206970 + ... + 211891.

It is an arithmetic number, because the mean of its divisors is an integer number (135711288).

Almost surely, 2^1030816921 is an apocalyptic number.

It is an amenable number.

1030816921 is a deficient number, since it is larger than the sum of its proper divisors (54873383).

1030816921 is a wasteful number, since it uses less digits than its factorization.

1030816921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418991.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1030816921 is about 32106.3377076863. The cubic root of 1030816921 is about 1010.1685569743.

The spelling of 1030816921 in words is "one billion, thirty million, eight hundred sixteen thousand, nine hundred twenty-one".