54988139 has 2 divisors, whose sum is σ = 54988140. Its totient is φ = 54988138.

The previous prime is 54988133. The next prime is 54988159. The reversal of 54988139 is 93188945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54988139 - 2²⁰ = 53939563 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54988093 and 54988102.

It is not a weakly prime, because it can be changed into another prime (54988133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27494069 + 27494070.

It is an arithmetic number, because the mean of its divisors is an integer number (27494070).

Almost surely, 2^54988139 is an apocalyptic number.

54988139 is a deficient number, since it is larger than the sum of its proper divisors (1).

54988139 is an equidigital number, since it uses as much as digits as its factorization.

54988139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The square root of 54988139 is about 7415.3987755211. The cubic root of 54988139 is about 380.2679066446.

It can be divided in two parts, 549 and 88139, that added together give a palindrome (88688).

The spelling of 54988139 in words is "fifty-four million, nine hundred eighty-eight thousand, one hundred thirty-nine".