121872743 has 2 divisors, whose sum is σ = 121872744. Its totient is φ = 121872742.

The previous prime is 121872733. The next prime is 121872763. The reversal of 121872743 is 347278121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121872743 - 2¹⁶ = 121807207 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121872713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60936371 + 60936372.

It is an arithmetic number, because the mean of its divisors is an integer number (60936372).

Almost surely, 2^121872743 is an apocalyptic number.

121872743 is a deficient number, since it is larger than the sum of its proper divisors (1).

121872743 is an equidigital number, since it uses as much as digits as its factorization.

121872743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 35.

The square root of 121872743 is about 11039.5988604659. The cubic root of 121872743 is about 495.7950600937.

The spelling of 121872743 in words is "one hundred twenty-one million, eight hundred seventy-two thousand, seven hundred forty-three".