243908001 has 12 divisors (see below), whose sum is σ = 352864512. Its totient is φ = 162350136.

The previous prime is 243907991. The next prime is 243908011. The reversal of 243908001 is 100809342.

It is an interprime number because it is at equal distance from previous prime (243907991) and next prime (243908011).

It is not a de Polignac number, because 243908001 - 2²² = 239713697 is a prime.

It is a super-2 number, since 2×243908001² = 118982225903632002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243908011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15121 + ... + 26766.

It is an arithmetic number, because the mean of its divisors is an integer number (29405376).

Almost surely, 2^243908001 is an apocalyptic number.

It is an amenable number.

243908001 is a deficient number, since it is larger than the sum of its proper divisors (108956511).

243908001 is a wasteful number, since it uses less digits than its factorization.

243908001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42540 (or 42537 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 243908001 is about 15617.5542579496. The cubic root of 243908001 is about 624.8014311060.

The spelling of 243908001 in words is "two hundred forty-three million, nine hundred eight thousand, one".