1244429987 has 2 divisors, whose sum is σ = 1244429988. Its totient is φ = 1244429986.

The previous prime is 1244429981. The next prime is 1244430053. The reversal of 1244429987 is 7899244421.

It is a weak prime.

It is an emirp because it is prime and its reverse (7899244421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1244429987 - 2¹⁸ = 1244167843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1244429981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622214993 + 622214994.

It is an arithmetic number, because the mean of its divisors is an integer number (622214994).

Almost surely, 2^1244429987 is an apocalyptic number.

1244429987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244429987 is an equidigital number, since it uses as much as digits as its factorization.

1244429987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The square root of 1244429987 is about 35276.4792319188. The cubic root of 1244429987 is about 1075.6149319666.

The spelling of 1244429987 in words is "one billion, two hundred forty-four million, four hundred twenty-nine thousand, nine hundred eighty-seven".