91369394 has 4 divisors (see below), whose sum is σ = 137054094. Its totient is φ = 45684696.

The previous prime is 91369393. The next prime is 91369417. The reversal of 91369394 is 49396319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49396319 = 7 ⋅7056617.

It can be written as a sum of positive squares in only one way, i.e., 87516025 + 3853369 = 9355^2 + 1963^2 .

It is not an unprimeable number, because it can be changed into a prime (91369393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22842347 + ... + 22842350.

Almost surely, 2^91369394 is an apocalyptic number.

91369394 is a deficient number, since it is larger than the sum of its proper divisors (45684700).

91369394 is a wasteful number, since it uses less digits than its factorization.

91369394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45684699.

The product of its digits is 157464, while the sum is 44.

The square root of 91369394 is about 9558.7339119781. The cubic root of 91369394 is about 450.4019355385.

It can be divided in two parts, 913 and 69394, that added together give a palindrome (70307).

The spelling of 91369394 in words is "ninety-one million, three hundred sixty-nine thousand, three hundred ninety-four".