23778143 has 2 divisors, whose sum is σ = 23778144. Its totient is φ = 23778142.

The previous prime is 23778137. The next prime is 23778169. The reversal of 23778143 is 34187732.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23778143 - 2¹⁶ = 23712607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23778103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11889071 + 11889072.

It is an arithmetic number, because the mean of its divisors is an integer number (11889072).

Almost surely, 2^23778143 is an apocalyptic number.

23778143 is a deficient number, since it is larger than the sum of its proper divisors (1).

23778143 is an equidigital number, since it uses as much as digits as its factorization.

23778143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 35.

The square root of 23778143 is about 4876.2837284145. The cubic root of 23778143 is about 287.5583468221.

The spelling of 23778143 in words is "twenty-three million, seven hundred seventy-eight thousand, one hundred forty-three".