99691256 has 16 divisors (see below), whose sum is σ = 213624240. Its totient is φ = 42724800.

The previous prime is 99691253. The next prime is 99691279. The reversal of 99691256 is 65219699.

It is a self number, because there is not a number n which added to its sum of digits gives 99691256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99691253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890045 + ... + 890156.

It is an arithmetic number, because the mean of its divisors is an integer number (13351515).

Almost surely, 2^99691256 is an apocalyptic number.

It is an amenable number.

99691256 is an abundant number, since it is smaller than the sum of its proper divisors (113932984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99691256 is a wasteful number, since it uses less digits than its factorization.

99691256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780214 (or 1780210 counting only the distinct ones).

The product of its digits is 262440, while the sum is 47.

The square root of 99691256 is about 9984.5508662133. The cubic root of 99691256 is about 463.6807033381.

The spelling of 99691256 in words is "ninety-nine million, six hundred ninety-one thousand, two hundred fifty-six".