91400005 has 8 divisors (see below), whose sum is σ = 109850400. Its totient is φ = 73006416.

The previous prime is 91399963. The next prime is 91400033. The reversal of 91400005 is 50000419.

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 91400005 - 2⁷ = 91399877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10575 + ... + 17164.

It is an arithmetic number, because the mean of its divisors is an integer number (13731300).

Almost surely, 2^91400005 is an apocalyptic number.

It is an amenable number.

91400005 is a deficient number, since it is larger than the sum of its proper divisors (18450395).

91400005 is a wasteful number, since it uses less digits than its factorization.

91400005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28403.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 91400005 is about 9560.3349836708. The cubic root of 91400005 is about 450.4522285073.

The spelling of 91400005 in words is "ninety-one million, four hundred thousand, five".