1340219641 has 2 divisors, whose sum is σ = 1340219642. Its totient is φ = 1340219640.

The previous prime is 1340219597. The next prime is 1340219653. The reversal of 1340219641 is 1469120431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1281926416 + 58293225 = 35804^2 + 7635^2 .

It is an emirp because it is prime and its reverse (1469120431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340219641 - 2⁹ = 1340219129 is a prime.

It is a super-2 number, since 2×1340219641² = 3592377372244337762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1340219341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670109820 + 670109821.

It is an arithmetic number, because the mean of its divisors is an integer number (670109821).

Almost surely, 2^1340219641 is an apocalyptic number.

It is an amenable number.

1340219641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340219641 is an equidigital number, since it uses as much as digits as its factorization.

1340219641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1340219641 is about 36609.0103799597. The cubic root of 1340219641 is about 1102.5340040897.

The spelling of 1340219641 in words is "one billion, three hundred forty million, two hundred nineteen thousand, six hundred forty-one".