54998989 has 2 divisors, whose sum is σ = 54998990. Its totient is φ = 54998988.

The previous prime is 54998969. The next prime is 54999011. The reversal of 54998989 is 98989945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41822089 + 13176900 = 6467^2 + 3630^2 .

It is a cyclic number.

It is not a de Polignac number, because 54998989 - 2¹³ = 54990797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54998959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27499494 + 27499495.

It is an arithmetic number, because the mean of its divisors is an integer number (27499495).

Almost surely, 2^54998989 is an apocalyptic number.

It is an amenable number.

54998989 is a deficient number, since it is larger than the sum of its proper divisors (1).

54998989 is an equidigital number, since it uses as much as digits as its factorization.

54998989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 61.

The square root of 54998989 is about 7416.1303251763. The cubic root of 54998989 is about 380.2929158892.

It can be divided in two parts, 5 and 4998989, that added together give a palindrome (4998994).

The spelling of 54998989 in words is "fifty-four million, nine hundred ninety-eight thousand, nine hundred eighty-nine".