54239387309 has 2 divisors, whose sum is σ = 54239387310. Its totient is φ = 54239387308.

The previous prime is 54239387303. The next prime is 54239387327. The reversal of 54239387309 is 90378393245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53454827209 + 784560100 = 231203^2 + 28010^2 .

It is a cyclic number.

It is not a de Polignac number, because 54239387309 - 2²⁴ = 54222610093 is a prime.

It is a super-2 number, since 2×54239387309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54239387303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27119693654 + 27119693655.

It is an arithmetic number, because the mean of its divisors is an integer number (27119693655).

Almost surely, 2^54239387309 is an apocalyptic number.

It is an amenable number.

54239387309 is a deficient number, since it is larger than the sum of its proper divisors (1).

54239387309 is an equidigital number, since it uses as much as digits as its factorization.

54239387309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 54239387309 in words is "fifty-four billion, two hundred thirty-nine million, three hundred eighty-seven thousand, three hundred nine".