1000921857 has 32 divisors (see below), whose sum is σ = 1458858240. Its totient is φ = 606735360.

The previous prime is 1000921853. The next prime is 1000921871. The reversal of 1000921857 is 7581290001.

1000921857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1000921857 - 2² = 1000921853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000921853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1585932 + ... + 1586562.

It is an arithmetic number, because the mean of its divisors is an integer number (45589320).

Almost surely, 2^1000921857 is an apocalyptic number.

It is an amenable number.

1000921857 is a deficient number, since it is larger than the sum of its proper divisors (457936383).

1000921857 is a wasteful number, since it uses less digits than its factorization.

1000921857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 1000921857 is about 31637.3490830063. The cubic root of 1000921857 is about 1000.3071912905.

The spelling of 1000921857 in words is "one billion, nine hundred twenty-one thousand, eight hundred fifty-seven".