921771041 has 2 divisors, whose sum is σ = 921771042. Its totient is φ = 921771040.

The previous prime is 921771007. The next prime is 921771043. The reversal of 921771041 is 140177129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917787025 + 3984016 = 30295^2 + 1996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921771041 is a prime.

It is a Sophie Germain prime.

Together with 921771043, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 921770989 and 921771007.

It is not a weakly prime, because it can be changed into another prime (921771043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460885520 + 460885521.

It is an arithmetic number, because the mean of its divisors is an integer number (460885521).

Almost surely, 2^921771041 is an apocalyptic number.

It is an amenable number.

921771041 is a deficient number, since it is larger than the sum of its proper divisors (1).

921771041 is an equidigital number, since it uses as much as digits as its factorization.

921771041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 921771041 is about 30360.6824857413. The cubic root of 921771041 is about 973.2125184561.

The spelling of 921771041 in words is "nine hundred twenty-one million, seven hundred seventy-one thousand, forty-one".