1306400239 has 2 divisors, whose sum is σ = 1306400240. Its totient is φ = 1306400238.

The previous prime is 1306400167. The next prime is 1306400269. The reversal of 1306400239 is 9320046031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1306400239 - 2⁷ = 1306400111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306400269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653200119 + 653200120.

It is an arithmetic number, because the mean of its divisors is an integer number (653200120).

Almost surely, 2^1306400239 is an apocalyptic number.

1306400239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306400239 is an equidigital number, since it uses as much as digits as its factorization.

1306400239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1306400239 is about 36144.1591270291. The cubic root of 1306400239 is about 1093.1810223600.

The spelling of 1306400239 in words is "one billion, three hundred six million, four hundred thousand, two hundred thirty-nine".