99149878 has 4 divisors (see below), whose sum is σ = 148724820. Its totient is φ = 49574938.

The previous prime is 99149863. The next prime is 99149917. The reversal of 99149878 is 87894199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87894199 = 17 ⋅5170247.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24787468 + ... + 24787471.

It is an arithmetic number, because the mean of its divisors is an integer number (37181205).

Almost surely, 2^99149878 is an apocalyptic number.

99149878 is a deficient number, since it is larger than the sum of its proper divisors (49574942).

99149878 is a wasteful number, since it uses less digits than its factorization.

99149878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49574941.

The product of its digits is 1306368, while the sum is 55.

The square root of 99149878 is about 9957.4031755272. The cubic root of 99149878 is about 462.8398328293.

The spelling of 99149878 in words is "ninety-nine million, one hundred forty-nine thousand, eight hundred seventy-eight".