1340285623 has 2 divisors, whose sum is σ = 1340285624. Its totient is φ = 1340285622.

The previous prime is 1340285603. The next prime is 1340285657. The reversal of 1340285623 is 3265820431.

It is an a-pointer prime, because the next prime (1340285657) can be obtained adding 1340285623 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340285623 - 2¹³ = 1340277431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340285603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670142811 + 670142812.

It is an arithmetic number, because the mean of its divisors is an integer number (670142812).

Almost surely, 2^1340285623 is an apocalyptic number.

1340285623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340285623 is an equidigital number, since it uses as much as digits as its factorization.

1340285623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 1340285623 is about 36609.9115404558. The cubic root of 1340285623 is about 1102.5520971949.

The spelling of 1340285623 in words is "one billion, three hundred forty million, two hundred eighty-five thousand, six hundred twenty-three".