91003541 has 2 divisors, whose sum is σ = 91003542. Its totient is φ = 91003540.

The previous prime is 91003529. The next prime is 91003543. The reversal of 91003541 is 14530019.

91003541 = 6745² + 6746².

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45508516 + 45495025 = 6746^2 + 6745^2 .

It is a cyclic number.

It is not a de Polignac number, because 91003541 - 2¹⁰ = 91002517 is a prime.

Together with 91003543, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91003543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45501770 + 45501771.

It is an arithmetic number, because the mean of its divisors is an integer number (45501771).

Almost surely, 2^91003541 is an apocalyptic number.

91003541 is the 6746-th centered square number.

It is an amenable number.

91003541 is a deficient number, since it is larger than the sum of its proper divisors (1).

91003541 is an equidigital number, since it uses as much as digits as its factorization.

91003541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 91003541 is about 9539.5776111943. The cubic root of 91003541 is about 449.7999785950.

The spelling of 91003541 in words is "ninety-one million, three thousand, five hundred forty-one".