91131006 has 8 divisors (see below), whose sum is σ = 182262024. Its totient is φ = 30377000.

The previous prime is 91130993. The next prime is 91131031. The reversal of 91131006 is 60013119.

It is a happy number.

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

91131006 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7594245 + ... + 7594256.

It is an arithmetic number, because the mean of its divisors is an integer number (22782753).

Almost surely, 2^91131006 is an apocalyptic number.

91131006 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91131006 is a wasteful number, since it uses less digits than its factorization.

91131006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15188506.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 91131006 is about 9546.2561247853. The cubic root of 91131006 is about 450.0098862026.

The spelling of 91131006 in words is "ninety-one million, one hundred thirty-one thousand, six".