23903947 has 2 divisors, whose sum is σ = 23903948. Its totient is φ = 23903946.

The previous prime is 23903933. The next prime is 23903953. The reversal of 23903947 is 74930932.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23903947 is a prime.

It is not a weakly prime, because it can be changed into another prime (23903927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11951973 + 11951974.

It is an arithmetic number, because the mean of its divisors is an integer number (11951974).

Almost surely, 2^23903947 is an apocalyptic number.

23903947 is a deficient number, since it is larger than the sum of its proper divisors (1).

23903947 is an equidigital number, since it uses as much as digits as its factorization.

23903947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 23903947 is about 4889.1662888472. The cubic root of 23903947 is about 288.0645873342.

It can be divided in two parts, 239039 and 47, that added together give a triangular number (239086 = T₆₉₁).

The spelling of 23903947 in words is "twenty-three million, nine hundred three thousand, nine hundred forty-seven".