247990055 has 8 divisors (see below), whose sum is σ = 298866672. Its totient is φ = 197539648.

The previous prime is 247990027. The next prime is 247990079. The reversal of 247990055 is 550099742.

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

It is a cyclic number.

It is not a de Polignac number, because 247990055 - 2²² = 243795751 is a prime.

It is a super-2 number, since 2×247990055² = 122998134757806050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 247989994 and 247990021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105269 + ... + 107598.

It is an arithmetic number, because the mean of its divisors is an integer number (37358334).

Almost surely, 2^247990055 is an apocalyptic number.

247990055 is a deficient number, since it is larger than the sum of its proper divisors (50876617).

247990055 is a wasteful number, since it uses less digits than its factorization.

247990055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213105.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 247990055 is about 15747.6999907923. The cubic root of 247990055 is about 628.2677322395.

The spelling of 247990055 in words is "two hundred forty-seven million, nine hundred ninety thousand, fifty-five".