243400101999 has 8 divisors (see below), whose sum is σ = 325767437952. Its totient is φ = 161649750360.

The previous prime is 243400101979. The next prime is 243400102007. The reversal of 243400101999 is 999101004342.

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

It is a de Polignac number, because none of the positive numbers 2^k-243400101999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243400101999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243400101949) 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, 154245157 + ... + 154246734.

It is an arithmetic number, because the mean of its divisors is an integer number (40720929744).

Almost surely, 2^243400101999 is an apocalyptic number.

243400101999 is a deficient number, since it is larger than the sum of its proper divisors (82367335953).

243400101999 is a wasteful number, since it uses less digits than its factorization.

243400101999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308492157.

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 243400101999 in words is "two hundred forty-three billion, four hundred million, one hundred one thousand, nine hundred ninety-nine".