1440759497 has 2 divisors, whose sum is σ = 1440759498. Its totient is φ = 1440759496.

The previous prime is 1440759451. The next prime is 1440759511. The reversal of 1440759497 is 7949570441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1437623056 + 3136441 = 37916^2 + 1771^2 .

It is an emirp because it is prime and its reverse (7949570441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440759497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440759407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720379748 + 720379749.

It is an arithmetic number, because the mean of its divisors is an integer number (720379749).

Almost surely, 2^1440759497 is an apocalyptic number.

It is an amenable number.

1440759497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440759497 is an equidigital number, since it uses as much as digits as its factorization.

1440759497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 1440759497 is about 37957.3378544913. The cubic root of 1440759497 is about 1129.4417314417.

The spelling of 1440759497 in words is "one billion, four hundred forty million, seven hundred fifty-nine thousand, four hundred ninety-seven".