91940229 has 6 divisors (see below), whose sum is σ = 132802566. Its totient is φ = 61293480.

The previous prime is 91940207. The next prime is 91940239. The reversal of 91940229 is 92204919.

It can be written as a sum of positive squares in only one way, i.e., 47983329 + 43956900 = 6927^2 + 6630^2 .

It is not a de Polignac number, because 91940229 - 2⁵ = 91940197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91940193 and 91940202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91940239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5107782 + ... + 5107799.

It is an arithmetic number, because the mean of its divisors is an integer number (22133761).

Almost surely, 2^91940229 is an apocalyptic number.

It is an amenable number.

91940229 is a deficient number, since it is larger than the sum of its proper divisors (40862337).

91940229 is a wasteful number, since it uses less digits than its factorization.

91940229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10215587 (or 10215584 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 91940229 is about 9588.5467616318. The cubic root of 91940229 is about 451.3379587236.

The spelling of 91940229 in words is "ninety-one million, nine hundred forty thousand, two hundred twenty-nine".