91981298 has 8 divisors (see below), whose sum is σ = 138743280. Its totient is φ = 45733540.

The previous prime is 91981283. The next prime is 91981313. The reversal of 91981298 is 89218919.

It is an interprime number because it is at equal distance from previous prime (91981283) and next prime (91981313).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128108 + ... + 128823.

It is an arithmetic number, because the mean of its divisors is an integer number (17342910).

Almost surely, 2^91981298 is an apocalyptic number.

91981298 is a deficient number, since it is larger than the sum of its proper divisors (46761982).

91981298 is a wasteful number, since it uses less digits than its factorization.

91981298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257112.

The product of its digits is 93312, while the sum is 47.

The square root of 91981298 is about 9590.6880879320. The cubic root of 91981298 is about 451.4051517958.

The spelling of 91981298 in words is "ninety-one million, nine hundred eighty-one thousand, two hundred ninety-eight".