243649987003 has 2 divisors, whose sum is σ = 243649987004. Its totient is φ = 243649987002.

The previous prime is 243649986989. The next prime is 243649987027. The reversal of 243649987003 is 300789946342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243649987003 - 2²¹ = 243647889851 is a prime.

It is not a weakly prime, because it can be changed into another prime (243649987073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121824993501 + 121824993502.

It is an arithmetic number, because the mean of its divisors is an integer number (121824993502).

Almost surely, 2^243649987003 is an apocalyptic number.

243649987003 is a deficient number, since it is larger than the sum of its proper divisors (1).

243649987003 is an equidigital number, since it uses as much as digits as its factorization.

243649987003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 55.

The spelling of 243649987003 in words is "two hundred forty-three billion, six hundred forty-nine million, nine hundred eighty-seven thousand, three".