91039541 has 4 divisors (see below), whose sum is σ = 92286732. Its totient is φ = 89792352.

The previous prime is 91039523. The next prime is 91039567. The reversal of 91039541 is 14593019.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41280625 + 49758916 = 6425^2 + 7054^2 .

It is a cyclic number.

It is not a de Polignac number, because 91039541 - 2⁶ = 91039477 is a prime.

It is a super-3 number, since 3×91039541³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91039498 and 91039507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91039441) 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, 623486 + ... + 623631.

It is an arithmetic number, because the mean of its divisors is an integer number (23071683).

Almost surely, 2^91039541 is an apocalyptic number.

It is an amenable number.

91039541 is a deficient number, since it is larger than the sum of its proper divisors (1247191).

91039541 is a wasteful number, since it uses less digits than its factorization.

91039541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247190.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 91039541 is about 9541.4643006197. The cubic root of 91039541 is about 449.8592827506.

The spelling of 91039541 in words is "ninety-one million, thirty-nine thousand, five hundred forty-one".