424099987 has 2 divisors, whose sum is σ = 424099988. Its totient is φ = 424099986.

The previous prime is 424099913. The next prime is 424100021. The reversal of 424099987 is 789990424.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 424099987 - 2¹¹ = 424097939 is a prime.

It is not a weakly prime, because it can be changed into another prime (424799987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212049993 + 212049994.

It is an arithmetic number, because the mean of its divisors is an integer number (212049994).

Almost surely, 2^424099987 is an apocalyptic number.

424099987 is a deficient number, since it is larger than the sum of its proper divisors (1).

424099987 is an equidigital number, since it uses as much as digits as its factorization.

424099987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 424099987 is about 20593.6880378431. The cubic root of 424099987 is about 751.3161996217.

The spelling of 424099987 in words is "four hundred twenty-four million, ninety-nine thousand, nine hundred eighty-seven".