5491001 has 2 divisors, whose sum is σ = 5491002. Its totient is φ = 5491000.

The previous prime is 5490973. The next prime is 5491039. The reversal of 5491001 is 1001945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3385600 + 2105401 = 1840^2 + 1451^2 .

It is a cyclic number.

It is not a de Polignac number, because 5491001 - 2¹⁰ = 5489977 is a prime.

It is equal to p₃₈₀₂₀₇ and since 5491001 and 380207 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (5491081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2745500 + 2745501.

It is an arithmetic number, because the mean of its divisors is an integer number (2745501).

Almost surely, 2^5491001 is an apocalyptic number.

It is an amenable number.

5491001 is a deficient number, since it is larger than the sum of its proper divisors (1).

5491001 is an equidigital number, since it uses as much as digits as its factorization.

5491001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 5491001 is about 2343.2885012307. The cubic root of 5491001 is about 176.4210926833.

Adding to 5491001 its reverse (1001945), we get a palindrome (6492946).

The spelling of 5491001 in words is "five million, four hundred ninety-one thousand, one".