24691993 has 2 divisors, whose sum is σ = 24691994. Its totient is φ = 24691992.

The previous prime is 24691991. The next prime is 24691999. The reversal of 24691993 is 39919642.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21187609 + 3504384 = 4603^2 + 1872^2 .

It is a cyclic number.

It is not a de Polignac number, because 24691993 - 2¹ = 24691991 is a prime.

Together with 24691991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (24691991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12345996 + 12345997.

It is an arithmetic number, because the mean of its divisors is an integer number (12345997).

Almost surely, 2^24691993 is an apocalyptic number.

It is an amenable number.

24691993 is a deficient number, since it is larger than the sum of its proper divisors (1).

24691993 is an equidigital number, since it uses as much as digits as its factorization.

24691993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 43.

The square root of 24691993 is about 4969.1038427467. The cubic root of 24691993 is about 291.1959843831.

The spelling of 24691993 in words is "twenty-four million, six hundred ninety-one thousand, nine hundred ninety-three".