91348397 has 6 divisors (see below), whose sum is σ = 106262478. Its totient is φ = 78298584.

The previous prime is 91348379. The next prime is 91348417. The reversal of 91348397 is 79384319.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 74978281 + 16370116 = 8659^2 + 4046^2 .

It is not a de Polignac number, because 91348397 - 2⁸ = 91348141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91348897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 932078 + ... + 932175.

It is an arithmetic number, because the mean of its divisors is an integer number (17710413).

Almost surely, 2^91348397 is an apocalyptic number.

It is an amenable number.

91348397 is a deficient number, since it is larger than the sum of its proper divisors (14914081).

91348397 is a wasteful number, since it uses less digits than its factorization.

91348397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864267 (or 1864260 counting only the distinct ones).

The product of its digits is 163296, while the sum is 44.

The square root of 91348397 is about 9557.6355339592. The cubic root of 91348397 is about 450.3674315923.

The spelling of 91348397 in words is "ninety-one million, three hundred forty-eight thousand, three hundred ninety-seven".