1089981377 has 2 divisors, whose sum is σ = 1089981378. Its totient is φ = 1089981376.

The previous prime is 1089981353. The next prime is 1089981397. The reversal of 1089981377 is 7731899801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1015314496 + 74666881 = 31864^2 + 8641^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089981377 - 2⁸ = 1089981121 is a prime.

It is a super-2 number, since 2×1089981377² = 2376118804413632258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1089981397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544990688 + 544990689.

It is an arithmetic number, because the mean of its divisors is an integer number (544990689).

Almost surely, 2^1089981377 is an apocalyptic number.

It is an amenable number.

1089981377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089981377 is an equidigital number, since it uses as much as digits as its factorization.

1089981377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 53.

The square root of 1089981377 is about 33014.8660000310. The cubic root of 1089981377 is about 1029.1366054616.

The spelling of 1089981377 in words is "one billion, eighty-nine million, nine hundred eighty-one thousand, three hundred seventy-seven".