2389451081 has 2 divisors, whose sum is σ = 2389451082. Its totient is φ = 2389451080.

The previous prime is 2389451063. The next prime is 2389451087. The reversal of 2389451081 is 1801549832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1204714681 + 1184736400 = 34709^2 + 34420^2 .

It is a cyclic number.

It is not a de Polignac number, because 2389451081 - 2³⁰ = 1315709257 is a prime.

It is a super-2 number, since 2×2389451081² = 11418952936984137122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2389451087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1194725540 + 1194725541.

It is an arithmetic number, because the mean of its divisors is an integer number (1194725541).

Almost surely, 2^2389451081 is an apocalyptic number.

It is an amenable number.

2389451081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2389451081 is an equidigital number, since it uses as much as digits as its factorization.

2389451081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 2389451081 is about 48882.0118346207. The cubic root of 2389451081 is about 1336.9014096824.

The spelling of 2389451081 in words is "two billion, three hundred eighty-nine million, four hundred fifty-one thousand, eighty-one".