921942961 has 2 divisors, whose sum is σ = 921942962. Its totient is φ = 921942960.

The previous prime is 921942941. The next prime is 921942991. The reversal of 921942961 is 169249129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877640625 + 44302336 = 29625^2 + 6656^2 .

It is a cyclic number.

It is not a de Polignac number, because 921942961 - 2¹¹ = 921940913 is a prime.

It is not a weakly prime, because it can be changed into another prime (921942941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460971480 + 460971481.

It is an arithmetic number, because the mean of its divisors is an integer number (460971481).

Almost surely, 2^921942961 is an apocalyptic number.

It is an amenable number.

921942961 is a deficient number, since it is larger than the sum of its proper divisors (1).

921942961 is an equidigital number, since it uses as much as digits as its factorization.

921942961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 921942961 is about 30363.5136471391. The cubic root of 921942961 is about 973.2730194873.

The spelling of 921942961 in words is "nine hundred twenty-one million, nine hundred forty-two thousand, nine hundred sixty-one".