1201943243 has 2 divisors, whose sum is σ = 1201943244. Its totient is φ = 1201943242.

The previous prime is 1201943227. The next prime is 1201943273. The reversal of 1201943243 is 3423491021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201943243 - 2⁴ = 1201943227 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201943203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600971621 + 600971622.

It is an arithmetic number, because the mean of its divisors is an integer number (600971622).

Almost surely, 2^1201943243 is an apocalyptic number.

1201943243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201943243 is an equidigital number, since it uses as much as digits as its factorization.

1201943243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1201943243 is about 34669.0531021544. The cubic root of 1201943243 is about 1063.2318720048.

The spelling of 1201943243 in words is "one billion, two hundred one million, nine hundred forty-three thousand, two hundred forty-three".