91861955 has 8 divisors (see below), whose sum is σ = 110655072. Its totient is φ = 73209088.

The previous prime is 91861921. The next prime is 91861967. The reversal of 91861955 is 55916819.

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

It is a cyclic number.

It is not a de Polignac number, because 91861955 - 2⁸ = 91861699 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33614 + ... + 36243.

It is an arithmetic number, because the mean of its divisors is an integer number (13831884).

Almost surely, 2^91861955 is an apocalyptic number.

91861955 is a deficient number, since it is larger than the sum of its proper divisors (18793117).

91861955 is a wasteful number, since it uses less digits than its factorization.

91861955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70125.

The product of its digits is 97200, while the sum is 44.

The square root of 91861955 is about 9584.4642521113. The cubic root of 91861955 is about 451.2098390452.

The spelling of 91861955 in words is "ninety-one million, eight hundred sixty-one thousand, nine hundred fifty-five".