242373409 has 4 divisors (see below), whose sum is σ = 243200916. Its totient is φ = 241545904.

The previous prime is 242373401. The next prime is 242373431. The reversal of 242373409 is 904373242.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 212430625 + 29942784 = 14575^2 + 5472^2 .

It is a cyclic number.

It is not a de Polignac number, because 242373409 - 2³ = 242373401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242373401) 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, 413314 + ... + 413899.

It is an arithmetic number, because the mean of its divisors is an integer number (60800229).

Almost surely, 2^242373409 is an apocalyptic number.

It is an amenable number.

242373409 is a deficient number, since it is larger than the sum of its proper divisors (827507).

242373409 is an equidigital number, since it uses as much as digits as its factorization.

242373409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827506.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 242373409 is about 15568.3463797540. The cubic root of 242373409 is about 623.4883223569.

The spelling of 242373409 in words is "two hundred forty-two million, three hundred seventy-three thousand, four hundred nine".