247242087 has 6 divisors (see below), whose sum is σ = 357127472. Its totient is φ = 164828052.

The previous prime is 247242059. The next prime is 247242091. The reversal of 247242087 is 780242742.

It is not a de Polignac number, because 247242087 - 2⁸ = 247241831 is a prime.

It is a super-2 number, since 2×247242087² = 122257299168231138, 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 (247242007) 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, 13735663 + ... + 13735680.

Almost surely, 2^247242087 is an apocalyptic number.

247242087 is a deficient number, since it is larger than the sum of its proper divisors (109885385).

247242087 is a wasteful number, since it uses less digits than its factorization.

247242087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27471349 (or 27471346 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 247242087 is about 15723.9335727419. The cubic root of 247242087 is about 627.6354523123.

The spelling of 247242087 in words is "two hundred forty-seven million, two hundred forty-two thousand, eighty-seven".