91983049 has 12 divisors (see below), whose sum is σ = 98524692. Its totient is φ = 85817600.

The previous prime is 91983011. The next prime is 91983061. The reversal of 91983049 is 94038919.

It can be written as a sum of positive squares in 2 ways, for example, as 50509449 + 41473600 = 7107^2 + 6440^2 .

It is not a de Polignac number, because 91983049 - 2⁹ = 91982537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91982996 and 91983014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91983349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19569 + ... + 23809.

It is an arithmetic number, because the mean of its divisors is an integer number (8210391).

Almost surely, 2^91983049 is an apocalyptic number.

It is an amenable number.

91983049 is a deficient number, since it is larger than the sum of its proper divisors (6541643).

91983049 is a wasteful number, since it uses less digits than its factorization.

91983049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328 (or 4305 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 91983049 is about 9590.7793739612. The cubic root of 91983049 is about 451.4080161658.

The spelling of 91983049 in words is "ninety-one million, nine hundred eighty-three thousand, forty-nine".