247206987 has 6 divisors (see below), whose sum is σ = 357076772. Its totient is φ = 164804652.

The previous prime is 247206983. The next prime is 247207031. The reversal of 247206987 is 789602742.

247206987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 247206987 - 2² = 247206983 is a prime.

It is a super-2 number, since 2×247206987² = 122222588843236338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247206983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13733713 + ... + 13733730.

Almost surely, 2^247206987 is an apocalyptic number.

247206987 is a deficient number, since it is larger than the sum of its proper divisors (109869785).

247206987 is a wasteful number, since it uses less digits than its factorization.

247206987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27467449 (or 27467446 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 247206987 is about 15722.8174001990. The cubic root of 247206987 is about 627.6057499165.

The spelling of 247206987 in words is "two hundred forty-seven million, two hundred six thousand, nine hundred eighty-seven".