91919101 has 4 divisors (see below), whose sum is σ = 91938304. Its totient is φ = 91899900.

The previous prime is 91919083. The next prime is 91919141. The reversal of 91919101 is 10191919.

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.

It is a cyclic number.

It is not a de Polignac number, because 91919101 - 2⁷ = 91918973 is a prime.

It is a super-2 number, since 2×91919101² = 16898242257296402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91919141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4036 + ... + 14146.

It is an arithmetic number, because the mean of its divisors is an integer number (22984576).

Almost surely, 2^91919101 is an apocalyptic number.

It is an amenable number.

91919101 is a deficient number, since it is larger than the sum of its proper divisors (19203).

91919101 is a wasteful number, since it uses less digits than its factorization.

91919101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19202.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 91919101 is about 9587.4449672475. Note that the first 3 decimals coincide. The cubic root of 91919101 is about 451.3033833658.

The spelling of 91919101 in words is "ninety-one million, nine hundred nineteen thousand, one hundred one".