91329001 has 2 divisors, whose sum is σ = 91329002. Its totient is φ = 91329000.

The previous prime is 91328999. The next prime is 91329019. The reversal of 91329001 is 10092319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91298025 + 30976 = 9555^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 91329001 - 2¹ = 91328999 is a prime.

Together with 91328999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91329071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45664500 + 45664501.

It is an arithmetic number, because the mean of its divisors is an integer number (45664501).

Almost surely, 2^91329001 is an apocalyptic number.

It is an amenable number.

91329001 is a deficient number, since it is larger than the sum of its proper divisors (1).

91329001 is an equidigital number, since it uses as much as digits as its factorization.

91329001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 91329001 is about 9556.6207939836. The cubic root of 91329001 is about 450.3355538389.

The spelling of 91329001 in words is "ninety-one million, three hundred twenty-nine thousand, one".