491290601 has 2 divisors, whose sum is σ = 491290602. Its totient is φ = 491290600.

The previous prime is 491290567. The next prime is 491290627. The reversal of 491290601 is 106092194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350251225 + 141039376 = 18715^2 + 11876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491290601 is a prime.

It is not a weakly prime, because it can be changed into another prime (491290691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245645300 + 245645301.

It is an arithmetic number, because the mean of its divisors is an integer number (245645301).

Almost surely, 2^491290601 is an apocalyptic number.

It is an amenable number.

491290601 is a deficient number, since it is larger than the sum of its proper divisors (1).

491290601 is an equidigital number, since it uses as much as digits as its factorization.

491290601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 491290601 is about 22165.0761559711. The cubic root of 491290601 is about 789.0650698143.

The spelling of 491290601 in words is "four hundred ninety-one million, two hundred ninety thousand, six hundred one".