91516729 has 8 divisors (see below), whose sum is σ = 98543520. Its totient is φ = 84672576.

The previous prime is 91516709. The next prime is 91516741. The reversal of 91516729 is 92761519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91516729 - 2¹³ = 91508537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91516691 and 91516700.

It is not an unprimeable number, because it can be changed into a prime (91516709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44619 + ... + 46624.

It is an arithmetic number, because the mean of its divisors is an integer number (12317940).

Almost surely, 2^91516729 is an apocalyptic number.

It is an amenable number.

91516729 is a deficient number, since it is larger than the sum of its proper divisors (7026791).

91516729 is a wasteful number, since it uses less digits than its factorization.

91516729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91319.

The product of its digits is 34020, while the sum is 40.

The square root of 91516729 is about 9566.4376337276. The cubic root of 91516729 is about 450.6438996115.

The spelling of 91516729 in words is "ninety-one million, five hundred sixteen thousand, seven hundred twenty-nine".