91919272909 has 8 divisors (see below), whose sum is σ = 93440616192. Its totient is φ = 90410349120.

The previous prime is 91919272903. The next prime is 91919272999. The reversal of 91919272909 is 90927291919.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91919272909 - 2²³ = 91910884301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91919272903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3089949 + ... + 3119554.

It is an arithmetic number, because the mean of its divisors is an integer number (11680077024).

Almost surely, 2^91919272909 is an apocalyptic number.

It is an amenable number.

91919272909 is a deficient number, since it is larger than the sum of its proper divisors (1521343283).

91919272909 is a wasteful number, since it uses less digits than its factorization.

91919272909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6209747.

The product of its (nonzero) digits is 1653372, while the sum is 58.

The spelling of 91919272909 in words is "ninety-one billion, nine hundred nineteen million, two hundred seventy-two thousand, nine hundred nine".