54099989 has 2 divisors, whose sum is σ = 54099990. Its totient is φ = 54099988.

The previous prime is 54099959. The next prime is 54100009. The reversal of 54099989 is 98999045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36602500 + 17497489 = 6050^2 + 4183^2 .

It is a cyclic number.

It is not a de Polignac number, because 54099989 - 2¹² = 54095893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 54099989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54099959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27049994 + 27049995.

It is an arithmetic number, because the mean of its divisors is an integer number (27049995).

Almost surely, 2^54099989 is an apocalyptic number.

It is an amenable number.

54099989 is a deficient number, since it is larger than the sum of its proper divisors (1).

54099989 is an equidigital number, since it uses as much as digits as its factorization.

54099989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The square root of 54099989 is about 7355.2694716101. The cubic root of 54099989 is about 378.2094641721.

The spelling of 54099989 in words is "fifty-four million, ninety-nine thousand, nine hundred eighty-nine".