42303421987 has 2 divisors, whose sum is σ = 42303421988. Its totient is φ = 42303421986.

The previous prime is 42303421961. The next prime is 42303422087. The reversal of 42303421987 is 78912430324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42303421987 is a prime.

It is not a weakly prime, because it can be changed into another prime (42303421907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21151710993 + 21151710994.

It is an arithmetic number, because the mean of its divisors is an integer number (21151710994).

Almost surely, 2^42303421987 is an apocalyptic number.

42303421987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42303421987 is an equidigital number, since it uses as much as digits as its factorization.

42303421987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 42303421987 in words is "forty-two billion, three hundred three million, four hundred twenty-one thousand, nine hundred eighty-seven".