1340234957 has 2 divisors, whose sum is σ = 1340234958. Its totient is φ = 1340234956.

The previous prime is 1340234941. The next prime is 1340235011. The reversal of 1340234957 is 7594320431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1280852521 + 59382436 = 35789^2 + 7706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340234957 - 2⁴ = 1340234941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1340234957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340234927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670117478 + 670117479.

It is an arithmetic number, because the mean of its divisors is an integer number (670117479).

Almost surely, 2^1340234957 is an apocalyptic number.

It is an amenable number.

1340234957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340234957 is an equidigital number, since it uses as much as digits as its factorization.

1340234957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 1340234957 is about 36609.2195628369. The cubic root of 1340234957 is about 1102.5382039850.

The spelling of 1340234957 in words is "one billion, three hundred forty million, two hundred thirty-four thousand, nine hundred fifty-seven".