91838292011 has 4 divisors (see below), whose sum is σ = 93792298272. Its totient is φ = 89884285752.

The previous prime is 91838292001. The next prime is 91838292079. The reversal of 91838292011 is 11029283819.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11029283819 = 31 ⋅355783349.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91838292011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91838292001) 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, 977003060 + ... + 977003153.

It is an arithmetic number, because the mean of its divisors is an integer number (23448074568).

Almost surely, 2^91838292011 is an apocalyptic number.

91838292011 is a deficient number, since it is larger than the sum of its proper divisors (1954006261).

91838292011 is a wasteful number, since it uses less digits than its factorization.

91838292011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954006260.

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 91838292011 in words is "ninety-one billion, eight hundred thirty-eight million, two hundred ninety-two thousand, eleven".