99491611 has 4 divisors (see below), whose sum is σ = 99666424. Its totient is φ = 99316800.

The previous prime is 99491591. The next prime is 99491659. The reversal of 99491611 is 11619499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11619499 = 313 ⋅37123.

It is a cyclic number.

It is not a de Polignac number, because 99491611 - 2¹⁷ = 99360539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99491311) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86550 + ... + 87691.

It is an arithmetic number, because the mean of its divisors is an integer number (24916606).

Almost surely, 2^99491611 is an apocalyptic number.

99491611 is a deficient number, since it is larger than the sum of its proper divisors (174813).

99491611 is a wasteful number, since it uses less digits than its factorization.

99491611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174812.

The product of its digits is 17496, while the sum is 40.

The square root of 99491611 is about 9974.5481601925. The cubic root of 99491611 is about 463.3709690572.

The spelling of 99491611 in words is "ninety-nine million, four hundred ninety-one thousand, six hundred eleven".