91870941 has 16 divisors (see below), whose sum is σ = 131830848. Its totient is φ = 56697600.

The previous prime is 91870879. The next prime is 91870943. The reversal of 91870941 is 14907819.

It is a happy number.

It is not a de Polignac number, because 91870941 - 2⁷ = 91870813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91870941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91870943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11655 + ... + 17876.

It is an arithmetic number, because the mean of its divisors is an integer number (8239428).

Almost surely, 2^91870941 is an apocalyptic number.

It is an amenable number.

91870941 is a deficient number, since it is larger than the sum of its proper divisors (39959907).

91870941 is a wasteful number, since it uses less digits than its factorization.

91870941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29612.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 91870941 is about 9584.9330201103. The cubic root of 91870941 is about 451.2245511184.

The spelling of 91870941 in words is "ninety-one million, eight hundred seventy thousand, nine hundred forty-one".