1011907921 has 8 divisors (see below), whose sum is σ = 1070028288. Its totient is φ = 955380000.

The previous prime is 1011907913. The next prime is 1011907937. The reversal of 1011907921 is 1297091101.

It is a happy number.

1011907921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1011907921 - 2³ = 1011907913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011901921) 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, 396805 + ... + 399346.

It is an arithmetic number, because the mean of its divisors is an integer number (133753536).

Almost surely, 2^1011907921 is an apocalyptic number.

It is an amenable number.

1011907921 is a deficient number, since it is larger than the sum of its proper divisors (58120367).

1011907921 is an equidigital number, since it uses as much as digits as its factorization.

1011907921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796223.

The product of its (nonzero) digits is 1134, while the sum is 31.

The square root of 1011907921 is about 31810.5001689694. The cubic root of 1011907921 is about 1003.9536550117.

The spelling of 1011907921 in words is "one billion, eleven million, nine hundred seven thousand, nine hundred twenty-one".