1306690123 has 2 divisors, whose sum is σ = 1306690124. Its totient is φ = 1306690122.

The previous prime is 1306690111. The next prime is 1306690129. The reversal of 1306690123 is 3210966031.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1306690123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1306690129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653345061 + 653345062.

It is an arithmetic number, because the mean of its divisors is an integer number (653345062).

Almost surely, 2^1306690123 is an apocalyptic number.

1306690123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306690123 is an equidigital number, since it uses as much as digits as its factorization.

1306690123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1306690123 is about 36148.1690131049. The cubic root of 1306690123 is about 1093.2618736035.

The spelling of 1306690123 in words is "one billion, three hundred six million, six hundred ninety thousand, one hundred twenty-three".