23778061 has 2 divisors, whose sum is σ = 23778062. Its totient is φ = 23778060.

The previous prime is 23778059. The next prime is 23778091. The reversal of 23778061 is 16087732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21104836 + 2673225 = 4594^2 + 1635^2 .

It is a cyclic number.

It is not a de Polignac number, because 23778061 - 2¹ = 23778059 is a prime.

Together with 23778059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23778091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11889030 + 11889031.

It is an arithmetic number, because the mean of its divisors is an integer number (11889031).

Almost surely, 2^23778061 is an apocalyptic number.

It is an amenable number.

23778061 is a deficient number, since it is larger than the sum of its proper divisors (1).

23778061 is an equidigital number, since it uses as much as digits as its factorization.

23778061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 23778061 is about 4876.2753203649. The cubic root of 23778061 is about 287.5580162691.

The spelling of 23778061 in words is "twenty-three million, seven hundred seventy-eight thousand, sixty-one".