99138154 has 4 divisors (see below), whose sum is σ = 148707234. Its totient is φ = 49569076.

The previous prime is 99138131. The next prime is 99138163. The reversal of 99138154 is 45183199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45183199 = 739 ⋅61141.

It can be written as a sum of positive squares in only one way, i.e., 86992929 + 12145225 = 9327^2 + 3485^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24784537 + ... + 24784540.

Almost surely, 2^99138154 is an apocalyptic number.

99138154 is a deficient number, since it is larger than the sum of its proper divisors (49569080).

99138154 is a wasteful number, since it uses less digits than its factorization.

99138154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49569079.

The product of its digits is 38880, while the sum is 40.

The square root of 99138154 is about 9956.8144504154. The cubic root of 99138154 is about 462.8215892429.

The spelling of 99138154 in words is "ninety-nine million, one hundred thirty-eight thousand, one hundred fifty-four".