1078644893 has 2 divisors, whose sum is σ = 1078644894. Its totient is φ = 1078644892.

The previous prime is 1078644863. The next prime is 1078644911. The reversal of 1078644893 is 3984468701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 567297124 + 511347769 = 23818^2 + 22613^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078644893 - 2⁶ = 1078644829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078644863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539322446 + 539322447.

It is an arithmetic number, because the mean of its divisors is an integer number (539322447).

Almost surely, 2^1078644893 is an apocalyptic number.

It is an amenable number.

1078644893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078644893 is an equidigital number, since it uses as much as digits as its factorization.

1078644893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 1078644893 is about 32842.7296825340. The cubic root of 1078644893 is about 1025.5562772275.

The spelling of 1078644893 in words is "one billion, seventy-eight million, six hundred forty-four thousand, eight hundred ninety-three".