99378242 has 4 divisors (see below), whose sum is σ = 149067366. Its totient is φ = 49689120.

The previous prime is 99378241. The next prime is 99378247. The reversal of 99378242 is 24287399.

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., 98982601 + 395641 = 9949^2 + 629^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99378193 and 99378202.

It is not an unprimeable number, because it can be changed into a prime (99378241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24844559 + ... + 24844562.

Almost surely, 2^99378242 is an apocalyptic number.

99378242 is a deficient number, since it is larger than the sum of its proper divisors (49689124).

99378242 is a wasteful number, since it uses less digits than its factorization.

99378242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49689123.

The product of its digits is 217728, while the sum is 44.

The square root of 99378242 is about 9968.8636263117. The cubic root of 99378242 is about 463.1949010498.

The spelling of 99378242 in words is "ninety-nine million, three hundred seventy-eight thousand, two hundred forty-two".