23921197 has 2 divisors, whose sum is σ = 23921198. Its totient is φ = 23921196.

The previous prime is 23921189. The next prime is 23921213. The reversal of 23921197 is 79112932.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22410756 + 1510441 = 4734^2 + 1229^2 .

It is a cyclic number.

It is not a de Polignac number, because 23921197 - 2³ = 23921189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23921147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11960598 + 11960599.

It is an arithmetic number, because the mean of its divisors is an integer number (11960599).

Almost surely, 2^23921197 is an apocalyptic number.

It is an amenable number.

23921197 is a deficient number, since it is larger than the sum of its proper divisors (1).

23921197 is an equidigital number, since it uses as much as digits as its factorization.

23921197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The square root of 23921197 is about 4890.9300751493. The cubic root of 23921197 is about 288.1338634710.

The spelling of 23921197 in words is "twenty-three million, nine hundred twenty-one thousand, one hundred ninety-seven".