921961930 has 32 divisors (see below), whose sum is σ = 1732366800. Its totient is φ = 352926720.

The previous prime is 921961927. The next prime is 921961987. The reversal of 921961930 is 39169129.

921961930 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 8 ways, for example, as 411156729 + 510805201 = 20277^2 + 22601^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2146 + ... + 42994.

Almost surely, 2^921961930 is an apocalyptic number.

921961930 is a deficient number, since it is larger than the sum of its proper divisors (810404870).

921961930 is a wasteful number, since it uses less digits than its factorization.

921961930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40954.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 921961930 is about 30363.8260105672. The cubic root of 921961930 is about 973.2796944806.

The spelling of 921961930 in words is "nine hundred twenty-one million, nine hundred sixty-one thousand, nine hundred thirty".