91495421 has 4 divisors (see below), whose sum is σ = 91518144. Its totient is φ = 91472700.

The previous prime is 91495381. The next prime is 91495423. The reversal of 91495421 is 12459419.

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 91495421 - 2²² = 87301117 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 (91495423) 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, 3515 + ... + 13976.

It is an arithmetic number, because the mean of its divisors is an integer number (22879536).

Almost surely, 2^91495421 is an apocalyptic number.

It is an amenable number.

91495421 is a deficient number, since it is larger than the sum of its proper divisors (22723).

91495421 is a wasteful number, since it uses less digits than its factorization.

91495421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22722.

The product of its digits is 12960, while the sum is 35.

The square root of 91495421 is about 9565.3238836957. The cubic root of 91495421 is about 450.6089221611.

The spelling of 91495421 in words is "ninety-one million, four hundred ninety-five thousand, four hundred twenty-one".