87322399 has 2 divisors, whose sum is σ = 87322400. Its totient is φ = 87322398.

The previous prime is 87322397. The next prime is 87322409. The reversal of 87322399 is 99322378.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87322399 - 2¹ = 87322397 is a prime.

Together with 87322397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87322397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43661199 + 43661200.

It is an arithmetic number, because the mean of its divisors is an integer number (43661200).

Almost surely, 2^87322399 is an apocalyptic number.

87322399 is a deficient number, since it is larger than the sum of its proper divisors (1).

87322399 is an equidigital number, since it uses as much as digits as its factorization.

87322399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 87322399 is about 9344.6454721407. The cubic root of 87322399 is about 443.6514304903.

The spelling of 87322399 in words is "eighty-seven million, three hundred twenty-two thousand, three hundred ninety-nine".