91416641 has 4 divisors (see below), whose sum is σ = 91739952. Its totient is φ = 91093332.

The previous prime is 91416631. The next prime is 91416643. The reversal of 91416641 is 14661419.

It is a happy number.

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 91416641 - 2²² = 87222337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91416598 and 91416607.

It is not an unprimeable number, because it can be changed into a prime (91416643) 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, 161231 + ... + 161796.

It is an arithmetic number, because the mean of its divisors is an integer number (22934988).

Almost surely, 2^91416641 is an apocalyptic number.

It is an amenable number.

91416641 is a deficient number, since it is larger than the sum of its proper divisors (323311).

91416641 is a wasteful number, since it uses less digits than its factorization.

91416641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323310.

The product of its digits is 5184, while the sum is 32.

The square root of 91416641 is about 9561.2049972794. The cubic root of 91416641 is about 450.4795562544.

The spelling of 91416641 in words is "ninety-one million, four hundred sixteen thousand, six hundred forty-one".