91672011 has 6 divisors (see below), whose sum is σ = 132415140. Its totient is φ = 61114668.

The previous prime is 91671971. The next prime is 91672019. The reversal of 91672011 is 11027619.

It is not a de Polignac number, because 91672011 - 2⁶ = 91671947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91672019) 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 5 ways as a sum of consecutive naturals, for example, 5092881 + ... + 5092898.

It is an arithmetic number, because the mean of its divisors is an integer number (22069190).

Almost surely, 2^91672011 is an apocalyptic number.

91672011 is a deficient number, since it is larger than the sum of its proper divisors (40743129).

91672011 is a wasteful number, since it uses less digits than its factorization.

91672011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10185785 (or 10185782 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 91672011 is about 9574.5501722013. The cubic root of 91672011 is about 450.8986338954.

It can be divided in two parts, 916 and 72011, that added together give a palindrome (72927).

The spelling of 91672011 in words is "ninety-one million, six hundred seventy-two thousand, eleven".