1240890293 has 2 divisors, whose sum is σ = 1240890294. Its totient is φ = 1240890292.

The previous prime is 1240890283. The next prime is 1240890341. The reversal of 1240890293 is 3920980421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 791747044 + 449143249 = 28138^2 + 21193^2 .

It is an emirp because it is prime and its reverse (3920980421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240890293 - 2⁸ = 1240890037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240890223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620445146 + 620445147.

It is an arithmetic number, because the mean of its divisors is an integer number (620445147).

Almost surely, 2^1240890293 is an apocalyptic number.

It is an amenable number.

1240890293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240890293 is an equidigital number, since it uses as much as digits as its factorization.

1240890293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1240890293 is about 35226.2727662181. The cubic root of 1240890293 is about 1074.5941263534.

The spelling of 1240890293 in words is "one billion, two hundred forty million, eight hundred ninety thousand, two hundred ninety-three".