91430193 has 4 divisors (see below), whose sum is σ = 121906928. Its totient is φ = 60953460.

The previous prime is 91430189. The next prime is 91430201. The reversal of 91430193 is 39103419.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39103419 = 3 ⋅13034473.

It is not a de Polignac number, because 91430193 - 2² = 91430189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91430193.

It is not an unprimeable number, because it can be changed into a prime (91430153) 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, 15238363 + ... + 15238368.

It is an arithmetic number, because the mean of its divisors is an integer number (30476732).

Almost surely, 2^91430193 is an apocalyptic number.

It is an amenable number.

91430193 is a deficient number, since it is larger than the sum of its proper divisors (30476735).

91430193 is a wasteful number, since it uses less digits than its factorization.

91430193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30476734.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 91430193 is about 9561.9136682988. The cubic root of 91430193 is about 450.5018155033.

The spelling of 91430193 in words is "ninety-one million, four hundred thirty thousand, one hundred ninety-three".