91029049 has 2 divisors, whose sum is σ = 91029050. Its totient is φ = 91029048.

The previous prime is 91029047. The next prime is 91029097. The reversal of 91029049 is 94092019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62299449 + 28729600 = 7893^2 + 5360^2 .

It is a cyclic number.

It is not a de Polignac number, because 91029049 - 2¹ = 91029047 is a prime.

Together with 91029047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91029047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45514524 + 45514525.

It is an arithmetic number, because the mean of its divisors is an integer number (45514525).

Almost surely, 2^91029049 is an apocalyptic number.

It is an amenable number.

91029049 is a deficient number, since it is larger than the sum of its proper divisors (1).

91029049 is an equidigital number, since it uses as much as digits as its factorization.

91029049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 91029049 is about 9540.9144739904. The cubic root of 91029049 is about 449.8420004984.

The spelling of 91029049 in words is "ninety-one million, twenty-nine thousand, forty-nine".