24139387 has 2 divisors, whose sum is σ = 24139388. Its totient is φ = 24139386.

The previous prime is 24139369. The next prime is 24139411. The reversal of 24139387 is 78393142.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 24139387 - 2¹¹ = 24137339 is a prime.

It is not a weakly prime, because it can be changed into another prime (24134387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12069693 + 12069694.

It is an arithmetic number, because the mean of its divisors is an integer number (12069694).

Almost surely, 2^24139387 is an apocalyptic number.

24139387 is a deficient number, since it is larger than the sum of its proper divisors (1).

24139387 is an equidigital number, since it uses as much as digits as its factorization.

24139387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 24139387 is about 4913.1850158528. The cubic root of 24139387 is about 289.0072554781.

The spelling of 24139387 in words is "twenty-four million, one hundred thirty-nine thousand, three hundred eighty-seven".