96557991 has 4 divisors (see below), whose sum is σ = 128743992. Its totient is φ = 64371992.

The previous prime is 96557957. The next prime is 96557999. The reversal of 96557991 is 19975569.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 96557991 - 2⁷ = 96557863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (96557999) 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, 16092996 + ... + 16093001.

It is an arithmetic number, because the mean of its divisors is an integer number (32185998).

Almost surely, 2^96557991 is an apocalyptic number.

96557991 is a deficient number, since it is larger than the sum of its proper divisors (32186001).

96557991 is a wasteful number, since it uses less digits than its factorization.

96557991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32186000.

The product of its digits is 765450, while the sum is 51.

The square root of 96557991 is about 9826.3925730657. The cubic root of 96557991 is about 458.7711229747.

The spelling of 96557991 in words is "ninety-six million, five hundred fifty-seven thousand, nine hundred ninety-one".