23691947 has 2 divisors, whose sum is σ = 23691948. Its totient is φ = 23691946.

The previous prime is 23691929. The next prime is 23691949. The reversal of 23691947 is 74919632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23691947 - 2⁶ = 23691883 is a prime.

It is a super-2 number, since 2×23691947² = 1122616705301618, which contains 22 as substring.

Together with 23691949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23691949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11845973 + 11845974.

It is an arithmetic number, because the mean of its divisors is an integer number (11845974).

Almost surely, 2^23691947 is an apocalyptic number.

23691947 is a deficient number, since it is larger than the sum of its proper divisors (1).

23691947 is an equidigital number, since it uses as much as digits as its factorization.

23691947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 23691947 is about 4867.4374161359. The cubic root of 23691947 is about 287.2104588477.

The spelling of 23691947 in words is "twenty-three million, six hundred ninety-one thousand, nine hundred forty-seven".