99874138 has 64 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 38001600.

The previous prime is 99874129. The next prime is 99874139. The reversal of 99874138 is 83147899.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 99874091 and 99874100.

It is not an unprimeable number, because it can be changed into a prime (99874139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 762333 + ... + 762463.

It is an arithmetic number, because the mean of its divisors is an integer number (2993760).

Almost surely, 2^99874138 is an apocalyptic number.

99874138 is a deficient number, since it is larger than the sum of its proper divisors (91726502).

99874138 is a wasteful number, since it uses less digits than its factorization.

99874138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283.

The product of its digits is 435456, while the sum is 49.

The square root of 99874138 is about 9993.7049185975. The cubic root of 99874138 is about 463.9640683878.

The spelling of 99874138 in words is "ninety-nine million, eight hundred seventy-four thousand, one hundred thirty-eight".