91091412237 has 12 divisors (see below), whose sum is σ = 141284639616. Its totient is φ = 52052235480.

The previous prime is 91091412233. The next prime is 91091412289. The reversal of 91091412237 is 73221419019.

It is not a de Polignac number, because 91091412237 - 2² = 91091412233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91091412195 and 91091412204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91091412233) 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, 309834589 + ... + 309834882.

It is an arithmetic number, because the mean of its divisors is an integer number (11773719968).

Almost surely, 2^91091412237 is an apocalyptic number.

It is an amenable number.

91091412237 is a deficient number, since it is larger than the sum of its proper divisors (50193227379).

91091412237 is a wasteful number, since it uses less digits than its factorization.

91091412237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619669488 (or 619669481 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 91091412237 in words is "ninety-one billion, ninety-one million, four hundred twelve thousand, two hundred thirty-seven".