1440659791 has 2 divisors, whose sum is σ = 1440659792. Its totient is φ = 1440659790.

The previous prime is 1440659777. The next prime is 1440659797. The reversal of 1440659791 is 1979560441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1440659791 - 2⁹ = 1440659279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440659797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720329895 + 720329896.

It is an arithmetic number, because the mean of its divisors is an integer number (720329896).

Almost surely, 2^1440659791 is an apocalyptic number.

1440659791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440659791 is an equidigital number, since it uses as much as digits as its factorization.

1440659791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1440659791 is about 37956.0244361814. The cubic root of 1440659791 is about 1129.4156769625.

The spelling of 1440659791 in words is "one billion, four hundred forty million, six hundred fifty-nine thousand, seven hundred ninety-one".