1300399987 has 2 divisors, whose sum is σ = 1300399988. Its totient is φ = 1300399986.

The previous prime is 1300399981. The next prime is 1300400021. The reversal of 1300399987 is 7899930031.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1300399987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1300399987.

It is not a weakly prime, because it can be changed into another prime (1300399981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650199993 + 650199994.

It is an arithmetic number, because the mean of its divisors is an integer number (650199994).

Almost surely, 2^1300399987 is an apocalyptic number.

1300399987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1300399987 is an equidigital number, since it uses as much as digits as its factorization.

1300399987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 1300399987 is about 36061.0591497255. The cubic root of 1300399987 is about 1091.5048056766.

The spelling of 1300399987 in words is "one billion, three hundred million, three hundred ninety-nine thousand, nine hundred eighty-seven".