242753691 has 4 divisors (see below), whose sum is σ = 323671592. Its totient is φ = 161835792.

The previous prime is 242753681. The next prime is 242753699. The reversal of 242753691 is 196357242.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 242753691 - 2⁶ = 242753627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242753699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40458946 + ... + 40458951.

It is an arithmetic number, because the mean of its divisors is an integer number (80917898).

Almost surely, 2^242753691 is an apocalyptic number.

242753691 is a deficient number, since it is larger than the sum of its proper divisors (80917901).

242753691 is an equidigital number, since it uses as much as digits as its factorization.

242753691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80917900.

The product of its digits is 90720, while the sum is 39.

The square root of 242753691 is about 15580.5549002595. The cubic root of 242753691 is about 623.8142347466.

It can be divided in two parts, 24275 and 3691, that added together give a triangular number (27966 = T₂₃₆).

The spelling of 242753691 in words is "two hundred forty-two million, seven hundred fifty-three thousand, six hundred ninety-one".