99991154 has 8 divisors (see below), whose sum is σ = 150113628. Its totient is φ = 49953280.

The previous prime is 99991109. The next prime is 99991207. The reversal of 99991154 is 45119999.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 98465929 + 1525225 = 9923^2 + 1235^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 99991099 and 99991108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18107 + ... + 22974.

Almost surely, 2^99991154 is an apocalyptic number.

99991154 is a deficient number, since it is larger than the sum of its proper divisors (50122474).

99991154 is a wasteful number, since it uses less digits than its factorization.

99991154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42300.

The product of its digits is 131220, while the sum is 47.

The square root of 99991154 is about 9999.5576902181. The cubic root of 99991154 is about 464.1451964594.

The spelling of 99991154 in words is "ninety-nine million, nine hundred ninety-one thousand, one hundred fifty-four".