90348191 has 4 divisors (see below), whose sum is σ = 92790072. Its totient is φ = 87906312.

The previous prime is 90348187. The next prime is 90348221. The reversal of 90348191 is 19184309.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90348191 - 2² = 90348187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90348101) 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, 1220885 + ... + 1220958.

It is an arithmetic number, because the mean of its divisors is an integer number (23197518).

Almost surely, 2^90348191 is an apocalyptic number.

90348191 is a deficient number, since it is larger than the sum of its proper divisors (2441881).

90348191 is a wasteful number, since it uses less digits than its factorization.

90348191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441880.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 90348191 is about 9505.1665424652. The cubic root of 90348191 is about 448.7176512659.

It can be divided in two parts, 903 and 48191, that added together give a palindrome (49094).

The spelling of 90348191 in words is "ninety million, three hundred forty-eight thousand, one hundred ninety-one".