87478799 has 2 divisors, whose sum is σ = 87478800. Its totient is φ = 87478798.

The previous prime is 87478739. The next prime is 87478801. The reversal of 87478799 is 99787478.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87478799 - 2¹² = 87474703 is a prime.

Together with 87478801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87478739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43739399 + 43739400.

It is an arithmetic number, because the mean of its divisors is an integer number (43739400).

Almost surely, 2^87478799 is an apocalyptic number.

87478799 is a deficient number, since it is larger than the sum of its proper divisors (1).

87478799 is an equidigital number, since it uses as much as digits as its factorization.

87478799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 59.

The square root of 87478799 is about 9353.0101571633. The cubic root of 87478799 is about 443.9161418745.

The spelling of 87478799 in words is "eighty-seven million, four hundred seventy-eight thousand, seven hundred ninety-nine".