2154756089 has 2 divisors, whose sum is σ = 2154756090. Its totient is φ = 2154756088.

The previous prime is 2154756073. The next prime is 2154756133. The reversal of 2154756089 is 9806574512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2078630464 + 76125625 = 45592^2 + 8725^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154756089 - 2⁴ = 2154756073 is a prime.

It is a super-4 number, since 4×2154756089⁴ (a number of 38 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (2154756059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077378044 + 1077378045.

It is an arithmetic number, because the mean of its divisors is an integer number (1077378045).

Almost surely, 2^2154756089 is an apocalyptic number.

It is an amenable number.

2154756089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154756089 is an equidigital number, since it uses as much as digits as its factorization.

2154756089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 2154756089 is about 46419.3503724470. The cubic root of 2154756089 is about 1291.6138863613.

The spelling of 2154756089 in words is "two billion, one hundred fifty-four million, seven hundred fifty-six thousand, eighty-nine".