99320861 has 4 divisors (see below), whose sum is σ = 99456000. Its totient is φ = 99185724.

The previous prime is 99320833. The next prime is 99320891. The reversal of 99320861 is 16802399.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16802399 = 89 ⋅188791.

It is a cyclic number.

It is not a de Polignac number, because 99320861 - 2⁶ = 99320797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99320801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66461 + ... + 67938.

It is an arithmetic number, because the mean of its divisors is an integer number (24864000).

Almost surely, 2^99320861 is an apocalyptic number.

It is an amenable number.

99320861 is a deficient number, since it is larger than the sum of its proper divisors (135139).

99320861 is a wasteful number, since it uses less digits than its factorization.

99320861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135138.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 99320861 is about 9965.9851996679. The cubic root of 99320861 is about 463.1057343026.

The spelling of 99320861 in words is "ninety-nine million, three hundred twenty thousand, eight hundred sixty-one".