91240829 has 2 divisors, whose sum is σ = 91240830. Its totient is φ = 91240828.

The previous prime is 91240823. The next prime is 91240837. The reversal of 91240829 is 92804219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64480900 + 26759929 = 8030^2 + 5173^2 .

It is a cyclic number.

It is not a de Polignac number, because 91240829 - 2²⁰ = 90192253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91240823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45620414 + 45620415.

It is an arithmetic number, because the mean of its divisors is an integer number (45620415).

Almost surely, 2^91240829 is an apocalyptic number.

It is an amenable number.

91240829 is a deficient number, since it is larger than the sum of its proper divisors (1).

91240829 is an equidigital number, since it uses as much as digits as its factorization.

91240829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 91240829 is about 9552.0065431301. The cubic root of 91240829 is about 450.1905842928.

The spelling of 91240829 in words is "ninety-one million, two hundred forty thousand, eight hundred twenty-nine".