91356401 has 4 divisors (see below), whose sum is σ = 91417152. Its totient is φ = 91295652.

The previous prime is 91356383. The next prime is 91356403. The reversal of 91356401 is 10465319.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10465319 = 17 ⋅615607.

It is a cyclic number.

It is not a de Polignac number, because 91356401 - 2⁶ = 91356337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91356403) 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, 28061 + ... + 31146.

It is an arithmetic number, because the mean of its divisors is an integer number (22854288).

Almost surely, 2^91356401 is an apocalyptic number.

It is an amenable number.

91356401 is a deficient number, since it is larger than the sum of its proper divisors (60751).

91356401 is a wasteful number, since it uses less digits than its factorization.

91356401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60750.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 91356401 is about 9558.0542475966. The cubic root of 91356401 is about 450.3805850274.

The spelling of 91356401 in words is "ninety-one million, three hundred fifty-six thousand, four hundred one".