1061966921 has 8 divisors (see below), whose sum is σ = 1099024200. Its totient is φ = 1024938880.

The previous prime is 1061966909. The next prime is 1061966963. The reversal of 1061966921 is 1296691601.

1061966921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 325441600 + 736525321 = 18040^2 + 27139^2 .

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

It is not a de Polignac number, because 1061966921 - 2¹⁴ = 1061950537 is a prime.

It is a super-2 number, since 2×1061966921² = 2255547482596440482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061966821) 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, 87725 + ... + 99093.

It is an arithmetic number, because the mean of its divisors is an integer number (137378025).

Almost surely, 2^1061966921 is an apocalyptic number.

It is an amenable number.

1061966921 is a deficient number, since it is larger than the sum of its proper divisors (37057279).

1061966921 is a wasteful number, since it uses less digits than its factorization.

1061966921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14619.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 1061966921 is about 32587.8339415187. The cubic root of 1061966921 is about 1020.2430924510.

The spelling of 1061966921 in words is "one billion, sixty-one million, nine hundred sixty-six thousand, nine hundred twenty-one".