1321847407 has 2 divisors, whose sum is σ = 1321847408. Its totient is φ = 1321847406.

The previous prime is 1321847389. The next prime is 1321847413. The reversal of 1321847407 is 7047481231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321847407 - 2⁷ = 1321847279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321847447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660923703 + 660923704.

It is an arithmetic number, because the mean of its divisors is an integer number (660923704).

Almost surely, 2^1321847407 is an apocalyptic number.

1321847407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321847407 is an equidigital number, since it uses as much as digits as its factorization.

1321847407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 1321847407 is about 36357.2194618895. The cubic root of 1321847407 is about 1097.4728229425.

The spelling of 1321847407 in words is "one billion, three hundred twenty-one million, eight hundred forty-seven thousand, four hundred seven".