91997834 has 8 divisors (see below), whose sum is σ = 140056608. Its totient is φ = 45312300.

The previous prime is 91997833. The next prime is 91997869. The reversal of 91997834 is 43879919.

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

It is not an unprimeable number, because it can be changed into a prime (91997833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343142 + ... + 343409.

It is an arithmetic number, because the mean of its divisors is an integer number (17507076).

Almost surely, 2^91997834 is an apocalyptic number.

91997834 is a deficient number, since it is larger than the sum of its proper divisors (48058774).

91997834 is a wasteful number, since it uses less digits than its factorization.

91997834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686620.

The product of its digits is 489888, while the sum is 50.

The square root of 91997834 is about 9591.5501354056. The cubic root of 91997834 is about 451.4322007304.

The spelling of 91997834 in words is "ninety-one million, nine hundred ninety-seven thousand, eight hundred thirty-four".