99511537 has 4 divisors (see below), whose sum is σ = 102201076. Its totient is φ = 96822000.

The previous prime is 99511513. The next prime is 99511543. The reversal of 99511537 is 73511599.

It is the 4073-rd star number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73511599 = 7 ⋅10501657.

It can be written as a sum of positive squares in 2 ways, for example, as 48874081 + 50637456 = 6991^2 + 7116^2 .

It is a cyclic number.

It is not a de Polignac number, because 99511537 - 2¹¹ = 99509489 is a prime.

It is a super-2 number, since 2×99511537² = 19805091992204738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99511537.

It is not an unprimeable number, because it can be changed into a prime (99511597) 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, 1344714 + ... + 1344787.

It is an arithmetic number, because the mean of its divisors is an integer number (25550269).

Almost surely, 2^99511537 is an apocalyptic number.

It is an amenable number.

99511537 is a deficient number, since it is larger than the sum of its proper divisors (2689539).

99511537 is a wasteful number, since it uses less digits than its factorization.

99511537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689538.

The product of its digits is 42525, while the sum is 40.

The square root of 99511537 is about 9975.5469524232. The cubic root of 99511537 is about 463.4019013590.

The spelling of 99511537 in words is "ninety-nine million, five hundred eleven thousand, five hundred thirty-seven".