247173987 has 8 divisors (see below), whose sum is σ = 336577536. Its totient is φ = 161276552.

The previous prime is 247173977. The next prime is 247174001. The reversal of 247173987 is 789371742.

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

It is not a de Polignac number, because 247173987 - 2⁷ = 247173859 is a prime.

It is a super-2 number, since 2×247173987² = 122189959698952338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247173937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876363 + ... + 876644.

It is an arithmetic number, because the mean of its divisors is an integer number (42072192).

Almost surely, 2^247173987 is an apocalyptic number.

247173987 is a deficient number, since it is larger than the sum of its proper divisors (89403549).

247173987 is a wasteful number, since it uses less digits than its factorization.

247173987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753057.

The product of its digits is 592704, while the sum is 48.

The square root of 247173987 is about 15721.7679349366. The cubic root of 247173987 is about 627.5778220228.

It can be divided in two parts, 247173 and 987, that added together give a triangular number (248160 = T₇₀₄).

The spelling of 247173987 in words is "two hundred forty-seven million, one hundred seventy-three thousand, nine hundred eighty-seven".