247861073087 has 4 divisors (see below), whose sum is σ = 250847351160. Its totient is φ = 244874795016.

The previous prime is 247861073069. The next prime is 247861073099. The reversal of 247861073087 is 780370168742.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247861073087 is a prime.

It is a super-2 number, since 2×247861073087² (a number of 24 digits) 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 (247861072087) 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, 1493138912 + ... + 1493139077.

It is an arithmetic number, because the mean of its divisors is an integer number (62711837790).

Almost surely, 2^247861073087 is an apocalyptic number.

247861073087 is a deficient number, since it is larger than the sum of its proper divisors (2986278073).

247861073087 is an equidigital number, since it uses as much as digits as its factorization.

247861073087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986278072.

The product of its (nonzero) digits is 3161088, while the sum is 53.

The spelling of 247861073087 in words is "two hundred forty-seven billion, eight hundred sixty-one million, seventy-three thousand, eighty-seven".