1089777893 has 2 divisors, whose sum is σ = 1089777894. Its totient is φ = 1089777892.

The previous prime is 1089777883. The next prime is 1089777901. The reversal of 1089777893 is 3987779801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1089462049 + 315844 = 33007^2 + 562^2 .

It is an emirp because it is prime and its reverse (3987779801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1089777893 - 2²⁶ = 1022669029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089777833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544888946 + 544888947.

It is an arithmetic number, because the mean of its divisors is an integer number (544888947).

Almost surely, 2^1089777893 is an apocalyptic number.

It is an amenable number.

1089777893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089777893 is an equidigital number, since it uses as much as digits as its factorization.

1089777893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5334336, while the sum is 59.

The square root of 1089777893 is about 33011.7841535413. The cubic root of 1089777893 is about 1029.0725597601.

The spelling of 1089777893 in words is "one billion, eighty-nine million, seven hundred seventy-seven thousand, eight hundred ninety-three".