921444361 has 2 divisors, whose sum is σ = 921444362. Its totient is φ = 921444360.

The previous prime is 921444313. The next prime is 921444371. The reversal of 921444361 is 163444129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 919605625 + 1838736 = 30325^2 + 1356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921444361 is a prime.

It is not a weakly prime, because it can be changed into another prime (921444371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460722180 + 460722181.

It is an arithmetic number, because the mean of its divisors is an integer number (460722181).

Almost surely, 2^921444361 is an apocalyptic number.

It is an amenable number.

921444361 is a deficient number, since it is larger than the sum of its proper divisors (1).

921444361 is an equidigital number, since it uses as much as digits as its factorization.

921444361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 921444361 is about 30355.3020245228. The cubic root of 921444361 is about 973.0975345041.

The spelling of 921444361 in words is "nine hundred twenty-one million, four hundred forty-four thousand, three hundred sixty-one".