87199423 has 2 divisors, whose sum is σ = 87199424. Its totient is φ = 87199422.

The previous prime is 87199421. The next prime is 87199451. The reversal of 87199423 is 32499178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87199423 - 2¹ = 87199421 is a prime.

Together with 87199421, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 87199423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87199421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43599711 + 43599712.

It is an arithmetic number, because the mean of its divisors is an integer number (43599712).

Almost surely, 2^87199423 is an apocalyptic number.

87199423 is a deficient number, since it is larger than the sum of its proper divisors (1).

87199423 is an equidigital number, since it uses as much as digits as its factorization.

87199423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 87199423 is about 9338.0631289363. The cubic root of 87199423 is about 443.4430681055.

The spelling of 87199423 in words is "eighty-seven million, one hundred ninety-nine thousand, four hundred twenty-three".