99078819 has 16 divisors (see below), whose sum is σ = 156184320. Its totient is φ = 54663840.

The previous prime is 99078809. The next prime is 99078841. The reversal of 99078819 is 91887099.

It is not a de Polignac number, because 99078819 - 2¹¹ = 99076771 is a prime.

It is a super-2 number, since 2×99078819² = 19633224748869522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99078809) 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, 80737 + ... + 81954.

It is an arithmetic number, because the mean of its divisors is an integer number (9761520).

Almost surely, 2^99078819 is an apocalyptic number.

99078819 is a deficient number, since it is larger than the sum of its proper divisors (57105501).

99078819 is a wasteful number, since it uses less digits than its factorization.

99078819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162730.

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 99078819 is about 9953.8343868079. The cubic root of 99078819 is about 462.7292366408.

The spelling of 99078819 in words is "ninety-nine million, seventy-eight thousand, eight hundred nineteen".