91869398 has 8 divisors (see below), whose sum is σ = 139168800. Its totient is φ = 45479800.

The previous prime is 91869391. The next prime is 91869403. The reversal of 91869398 is 89396819.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91869391) 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, 227198 + ... + 227601.

It is an arithmetic number, because the mean of its divisors is an integer number (17396100).

Almost surely, 2^91869398 is an apocalyptic number.

91869398 is a deficient number, since it is larger than the sum of its proper divisors (47299402).

91869398 is a wasteful number, since it uses less digits than its factorization.

91869398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454902.

The product of its digits is 839808, while the sum is 53.

The square root of 91869398 is about 9584.8525288603. The cubic root of 91869398 is about 451.2220249537. Note that the first 3 decimals are identical.

The spelling of 91869398 in words is "ninety-one million, eight hundred sixty-nine thousand, three hundred ninety-eight".