1340277403 has 2 divisors, whose sum is σ = 1340277404. Its totient is φ = 1340277402.

The previous prime is 1340277377. The next prime is 1340277431. The reversal of 1340277403 is 3047720431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340277403 - 2²¹ = 1338180251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340277473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670138701 + 670138702.

It is an arithmetic number, because the mean of its divisors is an integer number (670138702).

Almost surely, 2^1340277403 is an apocalyptic number.

1340277403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340277403 is an equidigital number, since it uses as much as digits as its factorization.

1340277403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 1340277403 is about 36609.7992756038. The cubic root of 1340277403 is about 1102.5498431985.

Adding to 1340277403 its reverse (3047720431), we get a palindrome (4387997834).

The spelling of 1340277403 in words is "one billion, three hundred forty million, two hundred seventy-seven thousand, four hundred three".