93616991 has 4 divisors (see below), whose sum is σ = 100818312. Its totient is φ = 86415672.

The previous prime is 93616987. The next prime is 93617021. The reversal of 93616991 is 19961639.

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 93616991 - 2² = 93616987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93612991) 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, 3600641 + ... + 3600666.

It is an arithmetic number, because the mean of its divisors is an integer number (25204578).

Almost surely, 2^93616991 is an apocalyptic number.

93616991 is a deficient number, since it is larger than the sum of its proper divisors (7201321).

93616991 is a wasteful number, since it uses less digits than its factorization.

93616991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7201320.

The product of its digits is 78732, while the sum is 44.

The square root of 93616991 is about 9675.5873723511. The cubic root of 93616991 is about 454.0652079547.

The spelling of 93616991 in words is "ninety-three million, six hundred sixteen thousand, nine hundred ninety-one".