1340029991 has 2 divisors, whose sum is σ = 1340029992. Its totient is φ = 1340029990.

The previous prime is 1340029961. The next prime is 1340030039. The reversal of 1340029991 is 1999200431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340029991 - 2¹⁴ = 1340013607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340029961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670014995 + 670014996.

It is an arithmetic number, because the mean of its divisors is an integer number (670014996).

Almost surely, 2^1340029991 is an apocalyptic number.

1340029991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340029991 is an equidigital number, since it uses as much as digits as its factorization.

1340029991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1340029991 is about 36606.4200789971. The cubic root of 1340029991 is about 1102.4819963364.

The spelling of 1340029991 in words is "one billion, three hundred forty million, twenty-nine thousand, nine hundred ninety-one".