23127661 has 2 divisors, whose sum is σ = 23127662. Its totient is φ = 23127660.

The previous prime is 23127659. The next prime is 23127677. The reversal of 23127661 is 16672132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12823561 + 10304100 = 3581^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 23127661 - 2¹ = 23127659 is a prime.

Together with 23127659, 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 (23121661) 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, 11563830 + 11563831.

It is an arithmetic number, because the mean of its divisors is an integer number (11563831).

Almost surely, 2^23127661 is an apocalyptic number.

It is an amenable number.

23127661 is a deficient number, since it is larger than the sum of its proper divisors (1).

23127661 is an equidigital number, since it uses as much as digits as its factorization.

23127661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 23127661 is about 4809.1226850643. The cubic root of 23127661 is about 284.9118882230.

Adding to 23127661 its reverse (16672132), we get a palindrome (39799793).

The spelling of 23127661 in words is "twenty-three million, one hundred twenty-seven thousand, six hundred sixty-one".