2155460389 has 2 divisors, whose sum is σ = 2155460390. Its totient is φ = 2155460388.

The previous prime is 2155460381. The next prime is 2155460407. The reversal of 2155460389 is 9830645512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2107269025 + 48191364 = 45905^2 + 6942^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155460389 - 2³ = 2155460381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155460381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077730194 + 1077730195.

It is an arithmetic number, because the mean of its divisors is an integer number (1077730195).

Almost surely, 2^2155460389 is an apocalyptic number.

It is an amenable number.

2155460389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155460389 is an equidigital number, since it uses as much as digits as its factorization.

2155460389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 2155460389 is about 46426.9360285600. The cubic root of 2155460389 is about 1291.7545959556.

The spelling of 2155460389 in words is "two billion, one hundred fifty-five million, four hundred sixty thousand, three hundred eighty-nine".