1340200291 has 4 divisors (see below), whose sum is σ = 1340273512. Its totient is φ = 1340127072.

The previous prime is 1340200261. The next prime is 1340200297. The reversal of 1340200291 is 1920020431.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1920020431 = 7 ⋅274288633.

It is a cyclic number.

It is not a de Polignac number, because 1340200291 - 2¹⁵ = 1340167523 is a prime.

It is a super-2 number, since 2×1340200291² = 3592273639992969362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340200297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17851 + ... + 54763.

It is an arithmetic number, because the mean of its divisors is an integer number (335068378).

Almost surely, 2^1340200291 is an apocalyptic number.

1340200291 is a deficient number, since it is larger than the sum of its proper divisors (73221).

1340200291 is an equidigital number, since it uses as much as digits as its factorization.

1340200291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73220.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1340200291 is about 36608.7460998052. The cubic root of 1340200291 is about 1102.5286979605.

The spelling of 1340200291 in words is "one billion, three hundred forty million, two hundred thousand, two hundred ninety-one".