1431443987 has 2 divisors, whose sum is σ = 1431443988. Its totient is φ = 1431443986.

The previous prime is 1431443977. The next prime is 1431444011. The reversal of 1431443987 is 7893441341.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1431443987 - 2⁸ = 1431443731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1431443977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715721993 + 715721994.

It is an arithmetic number, because the mean of its divisors is an integer number (715721994).

Almost surely, 2^1431443987 is an apocalyptic number.

1431443987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431443987 is an equidigital number, since it uses as much as digits as its factorization.

1431443987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 1431443987 is about 37834.4285935443. The cubic root of 1431443987 is about 1127.0022580338.

The spelling of 1431443987 in words is "one billion, four hundred thirty-one million, four hundred forty-three thousand, nine hundred eighty-seven".