1340953729 has 2 divisors, whose sum is σ = 1340953730. Its totient is φ = 1340953728.

The previous prime is 1340953703. The next prime is 1340953759. The reversal of 1340953729 is 9273590431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1192113729 + 148840000 = 34527^2 + 12200^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340953729 - 2²¹ = 1338856577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340953759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670476864 + 670476865.

It is an arithmetic number, because the mean of its divisors is an integer number (670476865).

Almost surely, 2^1340953729 is an apocalyptic number.

It is an amenable number.

1340953729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340953729 is an equidigital number, since it uses as much as digits as its factorization.

1340953729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 1340953729 is about 36619.0350637479. The cubic root of 1340953729 is about 1102.7352669351.

The spelling of 1340953729 in words is "one billion, three hundred forty million, nine hundred fifty-three thousand, seven hundred twenty-nine".