99967819 has 16 divisors (see below), whose sum is σ = 118674688. Its totient is φ = 82428192.

The previous prime is 99967817. The next prime is 99967831. The reversal of 99967819 is 91876999.

It is not a de Polignac number, because 99967819 - 2¹ = 99967817 is a prime.

It is a super-2 number, since 2×99967819² = 19987129671233522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99967811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17689 + ... + 22645.

It is an arithmetic number, because the mean of its divisors is an integer number (7417168).

Almost surely, 2^99967819 is an apocalyptic number.

99967819 is a deficient number, since it is larger than the sum of its proper divisors (18706869).

99967819 is a wasteful number, since it uses less digits than its factorization.

99967819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5074.

The product of its digits is 2204496, while the sum is 58.

The square root of 99967819 is about 9998.3908205271. The cubic root of 99967819 is about 464.1090876959.

The spelling of 99967819 in words is "ninety-nine million, nine hundred sixty-seven thousand, eight hundred nineteen".