99161942087 has 4 divisors (see below), whose sum is σ = 106789783800. Its totient is φ = 91534100376.

The previous prime is 99161942071. The next prime is 99161942119. The reversal of 99161942087 is 78024916199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99161942087 - 2⁴ = 99161942071 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 (99161942057) 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, 3813920837 + ... + 3813920862.

It is an arithmetic number, because the mean of its divisors is an integer number (26697445950).

Almost surely, 2^99161942087 is an apocalyptic number.

99161942087 is a deficient number, since it is larger than the sum of its proper divisors (7627841713).

99161942087 is a wasteful number, since it uses less digits than its factorization.

99161942087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7627841712.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The spelling of 99161942087 in words is "ninety-nine billion, one hundred sixty-one million, nine hundred forty-two thousand, eighty-seven".