240777391 has 2 divisors, whose sum is σ = 240777392. Its totient is φ = 240777390.

The previous prime is 240777373. The next prime is 240777419. The reversal of 240777391 is 193777042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240777391 - 2⁷ = 240777263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240777331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120388695 + 120388696.

It is an arithmetic number, because the mean of its divisors is an integer number (120388696).

Almost surely, 2^240777391 is an apocalyptic number.

240777391 is a deficient number, since it is larger than the sum of its proper divisors (1).

240777391 is an equidigital number, since it uses as much as digits as its factorization.

240777391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 240777391 is about 15517.0032867174. The cubic root of 240777391 is about 622.1167598552.

The spelling of 240777391 in words is "two hundred forty million, seven hundred seventy-seven thousand, three hundred ninety-one".