2539000921 has 2 divisors, whose sum is σ = 2539000922. Its totient is φ = 2539000920.

The previous prime is 2539000909. The next prime is 2539000931. The reversal of 2539000921 is 1290009352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2434040896 + 104960025 = 49336^2 + 10245^2 .

It is a cyclic number.

It is not a de Polignac number, because 2539000921 - 2²³ = 2530612313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2539000931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269500460 + 1269500461.

It is an arithmetic number, because the mean of its divisors is an integer number (1269500461).

Almost surely, 2^2539000921 is an apocalyptic number.

It is an amenable number.

2539000921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539000921 is an equidigital number, since it uses as much as digits as its factorization.

2539000921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 2539000921 is about 50388.4998883674. The cubic root of 2539000921 is about 1364.2300749155.

The spelling of 2539000921 in words is "two billion, five hundred thirty-nine million, nine hundred twenty-one", and thus it is an aban number.