99706378 has 4 divisors (see below), whose sum is σ = 149559570. Its totient is φ = 49853188.

The previous prime is 99706367. The next prime is 99706381. The reversal of 99706378 is 87360799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 96294969 + 3411409 = 9813^2 + 1847^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24926593 + ... + 24926596.

Almost surely, 2^99706378 is an apocalyptic number.

99706378 is a deficient number, since it is larger than the sum of its proper divisors (49853192).

99706378 is a wasteful number, since it uses less digits than its factorization.

99706378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49853191.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 99706378 is about 9985.3081074146. The cubic root of 99706378 is about 463.7041471364.

The spelling of 99706378 in words is "ninety-nine million, seven hundred six thousand, three hundred seventy-eight".