87499823 has 2 divisors, whose sum is σ = 87499824. Its totient is φ = 87499822.

The previous prime is 87499793. The next prime is 87499829. The reversal of 87499823 is 32899478.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87499823 - 2¹⁰ = 87498799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87499829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43749911 + 43749912.

It is an arithmetic number, because the mean of its divisors is an integer number (43749912).

Almost surely, 2^87499823 is an apocalyptic number.

87499823 is a deficient number, since it is larger than the sum of its proper divisors (1).

87499823 is an equidigital number, since it uses as much as digits as its factorization.

87499823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 87499823 is about 9354.1340058821. The cubic root of 87499823 is about 443.9517015206.

The spelling of 87499823 in words is "eighty-seven million, four hundred ninety-nine thousand, eight hundred twenty-three".