247364447 has 4 divisors (see below), whose sum is σ = 269852136. Its totient is φ = 224876760.

The previous prime is 247364443. The next prime is 247364449. The reversal of 247364447 is 744463742.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 247364447 - 2² = 247364443 is a prime.

It is a super-2 number, since 2×247364447² = 122378339279231618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247364441) 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, 11243828 + ... + 11243849.

It is an arithmetic number, because the mean of its divisors is an integer number (67463034).

Almost surely, 2^247364447 is an apocalyptic number.

247364447 is a deficient number, since it is larger than the sum of its proper divisors (22487689).

247364447 is a wasteful number, since it uses less digits than its factorization.

247364447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22487688.

The product of its digits is 451584, while the sum is 41.

The square root of 247364447 is about 15727.8239753629. The cubic root of 247364447 is about 627.7389740729.

The spelling of 247364447 in words is "two hundred forty-seven million, three hundred sixty-four thousand, four hundred forty-seven".