87430999 has 2 divisors, whose sum is σ = 87431000. Its totient is φ = 87430998.

The previous prime is 87430961. The next prime is 87431021. The reversal of 87430999 is 99903478.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87430999 - 2⁹ = 87430487 is a prime.

It is a super-2 number, since 2×87430999² = 15288359172276002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87430919) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43715499 + 43715500.

It is an arithmetic number, because the mean of its divisors is an integer number (43715500).

Almost surely, 2^87430999 is an apocalyptic number.

87430999 is a deficient number, since it is larger than the sum of its proper divisors (1).

87430999 is an equidigital number, since it uses as much as digits as its factorization.

87430999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 87430999 is about 9350.4544809330. The cubic root of 87430999 is about 443.8352725368.

The spelling of 87430999 in words is "eighty-seven million, four hundred thirty thousand, nine hundred ninety-nine".