91738 has 4 divisors (see below), whose sum is σ = 137610. Its totient is φ = 45868.

The previous prime is 91733. The next prime is 91753. The reversal of 91738 is 83719.

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

It can be written as a sum of positive squares in only one way, i.e., 71289 + 20449 = 267^2 + 143^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (91733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22933 + ... + 22936.

2⁹¹⁷³⁸ is an apocalyptic number.

91738 is a deficient number, since it is larger than the sum of its proper divisors (45872).

91738 is a wasteful number, since it uses less digits than its factorization.

91738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45871.

The product of its digits is 1512, while the sum is 28.

The square root of 91738 is about 302.8828156235. The cubic root of 91738 is about 45.1006799274.

The spelling of 91738 in words is "ninety-one thousand, seven hundred thirty-eight".