1067493821 has 2 divisors, whose sum is σ = 1067493822. Its totient is φ = 1067493820.

The previous prime is 1067493787. The next prime is 1067493851. The reversal of 1067493821 is 1283947601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991368196 + 76125625 = 31486^2 + 8725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1067493821 is a prime.

It is a super-2 number, since 2×1067493821² = 2279086115746360082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1067493851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533746910 + 533746911.

It is an arithmetic number, because the mean of its divisors is an integer number (533746911).

Almost surely, 2^1067493821 is an apocalyptic number.

It is an amenable number.

1067493821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1067493821 is an equidigital number, since it uses as much as digits as its factorization.

1067493821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1067493821 is about 32672.5239459703. The cubic root of 1067493821 is about 1022.0099483562.

The spelling of 1067493821 in words is "one billion, sixty-seven million, four hundred ninety-three thousand, eight hundred twenty-one".