242291687 has 4 divisors (see below), whose sum is σ = 264318216. Its totient is φ = 220265160.

The previous prime is 242291677. The next prime is 242291711. The reversal of 242291687 is 786192242.

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 242291687 - 2⁴ = 242291671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242291677) 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, 11013248 + ... + 11013269.

It is an arithmetic number, because the mean of its divisors is an integer number (66079554).

Almost surely, 2^242291687 is an apocalyptic number.

242291687 is a deficient number, since it is larger than the sum of its proper divisors (22026529).

242291687 is a wasteful number, since it uses less digits than its factorization.

242291687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22026528.

The product of its digits is 96768, while the sum is 41.

The square root of 242291687 is about 15565.7215380463. The cubic root of 242291687 is about 623.4182398059.

The spelling of 242291687 in words is "two hundred forty-two million, two hundred ninety-one thousand, six hundred eighty-seven".