87479999 has 2 divisors, whose sum is σ = 87480000. Its totient is φ = 87479998.

The previous prime is 87479993. The next prime is 87480007. The reversal of 87479999 is 99997478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87479999 - 2⁴ = 87479983 is a prime.

87479999 is a modest number, since divided by 9999 gives 8747 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87479993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43739999 + 43740000.

It is an arithmetic number, because the mean of its divisors is an integer number (43740000).

Almost surely, 2^87479999 is an apocalyptic number.

87479999 is a deficient number, since it is larger than the sum of its proper divisors (1).

87479999 is an equidigital number, since it uses as much as digits as its factorization.

87479999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 62.

The square root of 87479999 is about 9353.0743074136. The cubic root of 87479999 is about 443.9181716880.

The spelling of 87479999 in words is "eighty-seven million, four hundred seventy-nine thousand, nine hundred ninety-nine".