23553949 has 2 divisors, whose sum is σ = 23553950. Its totient is φ = 23553948.

The previous prime is 23553947. The next prime is 23553953. The reversal of 23553949 is 94935532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15657849 + 7896100 = 3957^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 23553949 - 2¹ = 23553947 is a prime.

Together with 23553947, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23553947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11776974 + 11776975.

It is an arithmetic number, because the mean of its divisors is an integer number (11776975).

Almost surely, 2^23553949 is an apocalyptic number.

It is an amenable number.

23553949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23553949 is an equidigital number, since it uses as much as digits as its factorization.

23553949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 40.

The square root of 23553949 is about 4853.2410819987. The cubic root of 23553949 is about 286.6517363476.

The spelling of 23553949 in words is "twenty-three million, five hundred fifty-three thousand, nine hundred forty-nine".