921694441 has 2 divisors, whose sum is σ = 921694442. Its totient is φ = 921694440.

The previous prime is 921694429. The next prime is 921694447. The reversal of 921694441 is 144496129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896403600 + 25290841 = 29940^2 + 5029^2 .

It is a cyclic number.

It is not a de Polignac number, because 921694441 - 2¹⁹ = 921170153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 921694394 and 921694403.

It is not a weakly prime, because it can be changed into another prime (921694447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460847220 + 460847221.

It is an arithmetic number, because the mean of its divisors is an integer number (460847221).

Almost surely, 2^921694441 is an apocalyptic number.

It is an amenable number.

921694441 is a deficient number, since it is larger than the sum of its proper divisors (1).

921694441 is an equidigital number, since it uses as much as digits as its factorization.

921694441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 921694441 is about 30359.4209595638. The cubic root of 921694441 is about 973.1855594317.

The spelling of 921694441 in words is "nine hundred twenty-one million, six hundred ninety-four thousand, four hundred forty-one".