291648001 has 2 divisors, whose sum is σ = 291648002. Its totient is φ = 291648000.

The previous prime is 291647999. The next prime is 291648017. The reversal of 291648001 is 100846192.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150038001 + 141610000 = 12249^2 + 11900^2 .

It is a cyclic number.

It is not a de Polignac number, because 291648001 - 2¹ = 291647999 is a prime.

Together with 291647999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (291648701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145824000 + 145824001.

It is an arithmetic number, because the mean of its divisors is an integer number (145824001).

Almost surely, 2^291648001 is an apocalyptic number.

It is an amenable number.

291648001 is a deficient number, since it is larger than the sum of its proper divisors (1).

291648001 is an equidigital number, since it uses as much as digits as its factorization.

291648001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 291648001 is about 17077.7047930921. The cubic root of 291648001 is about 663.1620540132.

The spelling of 291648001 in words is "two hundred ninety-one million, six hundred forty-eight thousand, one".