92009001991 has 4 divisors (see below), whose sum is σ = 92304851184. Its totient is φ = 91713152800.

The previous prime is 92009001941. The next prime is 92009002079. The reversal of 92009001991 is 19910090029.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19910090029 = 15391 ⋅1293619.

It is a cyclic number.

It is not a de Polignac number, because 92009001991 - 2¹⁵ = 92008969223 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 (92009001941) 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, 147924130 + ... + 147924751.

It is an arithmetic number, because the mean of its divisors is an integer number (23076212796).

Almost surely, 2^92009001991 is an apocalyptic number.

92009001991 is a deficient number, since it is larger than the sum of its proper divisors (295849193).

92009001991 is a wasteful number, since it uses less digits than its factorization.

92009001991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295849192.

The product of its (nonzero) digits is 13122, while the sum is 40.

The spelling of 92009001991 in words is "ninety-two billion, nine million, one thousand, nine hundred ninety-one".