91190237949 has 12 divisors (see below), whose sum is σ = 135968240512. Its totient is φ = 58832411400.

The previous prime is 91190237947. The next prime is 91190237959. The reversal of 91190237949 is 94973209119.

It is a happy number.

It is not a de Polignac number, because 91190237949 - 2¹ = 91190237947 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91190237895 and 91190237904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91190237947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163423087 + ... + 163423644.

Almost surely, 2^91190237949 is an apocalyptic number.

It is an amenable number.

91190237949 is a deficient number, since it is larger than the sum of its proper divisors (44778002563).

91190237949 is a wasteful number, since it uses less digits than its factorization.

91190237949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326846768 (or 326846765 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 91190237949 in words is "ninety-one billion, one hundred ninety million, two hundred thirty-seven thousand, nine hundred forty-nine".