55991098 has 8 divisors (see below), whose sum is σ = 88927092. Its totient is φ = 26348736.

The previous prime is 55991093. The next prime is 55991099. The reversal of 55991098 is 89019955.

It can be written as a sum of positive squares in 2 ways, for example, as 50594769 + 5396329 = 7113^2 + 2323^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (55991093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823365 + ... + 823432.

Almost surely, 2^55991098 is an apocalyptic number.

55991098 is a deficient number, since it is larger than the sum of its proper divisors (32935994).

55991098 is a wasteful number, since it uses less digits than its factorization.

55991098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646816.

The product of its (nonzero) digits is 145800, while the sum is 46.

The square root of 55991098 is about 7482.7199600145. The cubic root of 55991098 is about 382.5659629642.

The spelling of 55991098 in words is "fifty-five million, nine hundred ninety-one thousand, ninety-eight".