99939261 has 4 divisors (see below), whose sum is σ = 133252352. Its totient is φ = 66626172.

The previous prime is 99939253. The next prime is 99939269. The reversal of 99939261 is 16293999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (99939253) and next prime (99939269).

It is not a de Polignac number, because 99939261 - 2³ = 99939253 is a prime.

It is a super-2 number, since 2×99939261² = 19975711778452242, 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 99939261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99939269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16656541 + ... + 16656546.

It is an arithmetic number, because the mean of its divisors is an integer number (33313088).

Almost surely, 2^99939261 is an apocalyptic number.

It is an amenable number.

99939261 is a deficient number, since it is larger than the sum of its proper divisors (33313091).

99939261 is a wasteful number, since it uses less digits than its factorization.

99939261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33313090.

The product of its digits is 236196, while the sum is 48.

The square root of 99939261 is about 9996.9625887066. The cubic root of 99939261 is about 464.0648891736.

The spelling of 99939261 in words is "ninety-nine million, nine hundred thirty-nine thousand, two hundred sixty-one".