1343878537 has 2 divisors, whose sum is σ = 1343878538. Its totient is φ = 1343878536.

The previous prime is 1343878511. The next prime is 1343878561. The reversal of 1343878537 is 7358783431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 749445376 + 594433161 = 27376^2 + 24381^2 .

It is an emirp because it is prime and its reverse (7358783431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1343878537 - 2²³ = 1335489929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1343873537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671939268 + 671939269.

It is an arithmetic number, because the mean of its divisors is an integer number (671939269).

Almost surely, 2^1343878537 is an apocalyptic number.

It is an amenable number.

1343878537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343878537 is an equidigital number, since it uses as much as digits as its factorization.

1343878537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 49.

The square root of 1343878537 is about 36658.9489347417. The cubic root of 1343878537 is about 1103.5364247883.

The spelling of 1343878537 in words is "one billion, three hundred forty-three million, eight hundred seventy-eight thousand, five hundred thirty-seven".