91920041 has 4 divisors (see below), whose sum is σ = 92064084. Its totient is φ = 91776000.

The previous prime is 91920019. The next prime is 91920083. The reversal of 91920041 is 14002919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14002919 = 7 ⋅2000417.

It can be written as a sum of positive squares in 2 ways, for example, as 85008400 + 6911641 = 9220^2 + 2629^2 .

It is a cyclic number.

It is not a de Polignac number, because 91920041 - 2⁶ = 91919977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91929041) 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, 71060 + ... + 72341.

It is an arithmetic number, because the mean of its divisors is an integer number (23016021).

Almost surely, 2^91920041 is an apocalyptic number.

It is an amenable number.

91920041 is a deficient number, since it is larger than the sum of its proper divisors (144043).

91920041 is a wasteful number, since it uses less digits than its factorization.

91920041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144042.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 91920041 is about 9587.4939895679. The cubic root of 91920041 is about 451.3049217611.

The spelling of 91920041 in words is "ninety-one million, nine hundred twenty thousand, forty-one".