91650193 has 4 divisors (see below), whose sum is σ = 95635008. Its totient is φ = 87665380.

The previous prime is 91650161. The next prime is 91650199. The reversal of 91650193 is 39105619.

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 91650193 - 2⁵ = 91650161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91650199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1992373 + ... + 1992418.

It is an arithmetic number, because the mean of its divisors is an integer number (23908752).

Almost surely, 2^91650193 is an apocalyptic number.

It is an amenable number.

91650193 is a deficient number, since it is larger than the sum of its proper divisors (3984815).

91650193 is a wasteful number, since it uses less digits than its factorization.

91650193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984814.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 91650193 is about 9573.4107297243. The cubic root of 91650193 is about 450.8628596648.

The spelling of 91650193 in words is "ninety-one million, six hundred fifty thousand, one hundred ninety-three".