1346640787 has 2 divisors, whose sum is σ = 1346640788. Its totient is φ = 1346640786.

The previous prime is 1346640773. The next prime is 1346640833. The reversal of 1346640787 is 7870466431.

It is an a-pointer prime, because the next prime (1346640833) can be obtained adding 1346640787 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1346640787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1346640707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673320393 + 673320394.

It is an arithmetic number, because the mean of its divisors is an integer number (673320394).

Almost surely, 2^1346640787 is an apocalyptic number.

1346640787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1346640787 is an equidigital number, since it uses as much as digits as its factorization.

1346640787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 46.

The square root of 1346640787 is about 36696.6045704504. The cubic root of 1346640787 is about 1104.2919884552.

The spelling of 1346640787 in words is "one billion, three hundred forty-six million, six hundred forty thousand, seven hundred eighty-seven".