99919667 has 8 divisors (see below), whose sum is σ = 100821696. Its totient is φ = 99021312.

The previous prime is 99919661. The next prime is 99919669. The reversal of 99919667 is 76691999.

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 a de Polignac number, because none of the positive numbers 2^k-99919667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99919661) 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, 90038 + ... + 91140.

It is an arithmetic number, because the mean of its divisors is an integer number (12602712).

Almost surely, 2^99919667 is an apocalyptic number.

99919667 is a deficient number, since it is larger than the sum of its proper divisors (902029).

99919667 is a wasteful number, since it uses less digits than its factorization.

99919667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837.

The product of its digits is 1653372, while the sum is 56.

The square root of 99919667 is about 9995.9825430020. The cubic root of 99919667 is about 464.0345591456.

The spelling of 99919667 in words is "ninety-nine million, nine hundred nineteen thousand, six hundred sixty-seven".