91798001 has 2 divisors, whose sum is σ = 91798002. Its totient is φ = 91798000.

The previous prime is 91797997. The next prime is 91798009. The reversal of 91798001 is 10089719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86397025 + 5400976 = 9295^2 + 2324^2 .

It is a cyclic number.

It is not a de Polignac number, because 91798001 - 2² = 91797997 is a prime.

It is not a weakly prime, because it can be changed into another prime (91798009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45899000 + 45899001.

It is an arithmetic number, because the mean of its divisors is an integer number (45899001).

Almost surely, 2^91798001 is an apocalyptic number.

It is an amenable number.

91798001 is a deficient number, since it is larger than the sum of its proper divisors (1).

91798001 is an equidigital number, since it uses as much as digits as its factorization.

91798001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 91798001 is about 9581.1273345051. The cubic root of 91798001 is about 451.1051044527.

The spelling of 91798001 in words is "ninety-one million, seven hundred ninety-eight thousand, one".