99681151 has 8 divisors (see below), whose sum is σ = 103061504. Its totient is φ = 96311160.

The previous prime is 99681139. The next prime is 99681187. The reversal of 99681151 is 15118699.

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 99681151 - 2⁵ = 99681119 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 (99681191) 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, 20326 + ... + 24748.

It is an arithmetic number, because the mean of its divisors is an integer number (12882688).

Almost surely, 2^99681151 is an apocalyptic number.

99681151 is a deficient number, since it is larger than the sum of its proper divisors (3380353).

99681151 is a wasteful number, since it uses less digits than its factorization.

99681151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181.

The product of its digits is 19440, while the sum is 40.

The square root of 99681151 is about 9984.0448216141. The cubic root of 99681151 is about 463.6650361271.

The spelling of 99681151 in words is "ninety-nine million, six hundred eighty-one thousand, one hundred fifty-one".