240791891 has 2 divisors, whose sum is σ = 240791892. Its totient is φ = 240791890.

The previous prime is 240791867. The next prime is 240791923. The reversal of 240791891 is 198197042.

240791891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240791891 is a prime.

It is not a weakly prime, because it can be changed into another prime (240791821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120395945 + 120395946.

It is an arithmetic number, because the mean of its divisors is an integer number (120395946).

Almost surely, 2^240791891 is an apocalyptic number.

240791891 is a deficient number, since it is larger than the sum of its proper divisors (1).

240791891 is an equidigital number, since it uses as much as digits as its factorization.

240791891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 240791891 is about 15517.4705090746. The cubic root of 240791891 is about 622.1292478937.

The spelling of 240791891 in words is "two hundred forty million, seven hundred ninety-one thousand, eight hundred ninety-one".