91092002002 has 8 divisors (see below), whose sum is σ = 136651794300. Its totient is φ = 45541403904.

The previous prime is 91092001981. The next prime is 91092002009. The reversal of 91092002002 is 20020029019.

It can be written as a sum of positive squares in 2 ways, for example, as 87646194601 + 3445807401 = 296051^2 + 58701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (91092002009) 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, 2273727 + ... + 2313442.

Almost surely, 2^91092002002 is an apocalyptic number.

91092002002 is a deficient number, since it is larger than the sum of its proper divisors (45559792298).

91092002002 is a wasteful number, since it uses less digits than its factorization.

91092002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4597100.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 91092002002 in words is "ninety-one billion, ninety-two million, two thousand, two".