99509051 has 4 divisors (see below), whose sum is σ = 99612504. Its totient is φ = 99405600.

The previous prime is 99508999. The next prime is 99509057. The reversal of 99509051 is 15090599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15090599 = 23 ⋅656113.

It is a cyclic number.

It is not a de Polignac number, because 99509051 - 2¹⁸ = 99246907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99508996 and 99509014.

It is not an unprimeable number, because it can be changed into a prime (99509057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50270 + ... + 52211.

It is an arithmetic number, because the mean of its divisors is an integer number (24903126).

Almost surely, 2^99509051 is an apocalyptic number.

99509051 is a deficient number, since it is larger than the sum of its proper divisors (103453).

99509051 is a wasteful number, since it uses less digits than its factorization.

99509051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103452.

The product of its (nonzero) digits is 18225, while the sum is 38.

The square root of 99509051 is about 9975.4223469485. The cubic root of 99509051 is about 463.3980424204.

The spelling of 99509051 in words is "ninety-nine million, five hundred nine thousand, fifty-one".