99073978 has 8 divisors (see below), whose sum is σ = 152067168. Its totient is φ = 48384924.

The previous prime is 99073973. The next prime is 99073981. The reversal of 99073978 is 87937099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (99073973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575926 + ... + 576097.

It is an arithmetic number, because the mean of its divisors is an integer number (19008396).

Almost surely, 2^99073978 is an apocalyptic number.

99073978 is a deficient number, since it is larger than the sum of its proper divisors (52993190).

99073978 is a wasteful number, since it uses less digits than its factorization.

99073978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152068.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 99073978 is about 9953.5912112162. The cubic root of 99073978 is about 462.7217001874.

Subtracting from 99073978 its sum of digits (52), we obtain a triangular number (99073926 = T₁₄₀₇₆).

The spelling of 99073978 in words is "ninety-nine million, seventy-three thousand, nine hundred seventy-eight".