91616401 has 4 divisors (see below), whose sum is σ = 91653232. Its totient is φ = 91579572.

The previous prime is 91616389. The next prime is 91616407. The reversal of 91616401 is 10461619.

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 a cyclic number.

It is not a de Polignac number, because 91616401 - 2¹⁵ = 91583633 is a prime.

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 91616401.

It is not an unprimeable number, because it can be changed into a prime (91616407) 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, 14391 + ... + 19756.

It is an arithmetic number, because the mean of its divisors is an integer number (22913308).

Almost surely, 2^91616401 is an apocalyptic number.

It is an amenable number.

91616401 is a deficient number, since it is larger than the sum of its proper divisors (36831).

91616401 is a wasteful number, since it uses less digits than its factorization.

91616401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36830.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 91616401 is about 9571.6456787744. The cubic root of 91616401 is about 450.8074408668.

The spelling of 91616401 in words is "ninety-one million, six hundred sixteen thousand, four hundred one".