242688397 has 8 divisors (see below), whose sum is σ = 278020352. Its totient is φ = 207522000.

The previous prime is 242688371. The next prime is 242688409. The reversal of 242688397 is 793886242.

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

It is not a de Polignac number, because 242688397 - 2¹¹ = 242686349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242688397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242688337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38229 + ... + 44122.

It is an arithmetic number, because the mean of its divisors is an integer number (34752544).

Almost surely, 2^242688397 is an apocalyptic number.

It is an amenable number.

242688397 is a deficient number, since it is larger than the sum of its proper divisors (35331955).

242688397 is an equidigital number, since it uses as much as digits as its factorization.

242688397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82779.

The product of its digits is 1161216, while the sum is 49.

The square root of 242688397 is about 15578.4593910951. The cubic root of 242688397 is about 623.7583001641.

The spelling of 242688397 in words is "two hundred forty-two million, six hundred eighty-eight thousand, three hundred ninety-seven".