24991091 has 2 divisors, whose sum is σ = 24991092. Its totient is φ = 24991090.

The previous prime is 24991081. The next prime is 24991117. The reversal of 24991091 is 19019942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 24991091 - 2¹⁴ = 24974707 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (24991081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12495545 + 12495546.

It is an arithmetic number, because the mean of its divisors is an integer number (12495546).

Almost surely, 2^24991091 is an apocalyptic number.

24991091 is a deficient number, since it is larger than the sum of its proper divisors (1).

24991091 is an equidigital number, since it uses as much as digits as its factorization.

24991091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 24991091 is about 4999.1090206156. The cubic root of 24991091 is about 292.3670362626.

The spelling of 24991091 in words is "twenty-four million, nine hundred ninety-one thousand, ninety-one".