491234101 has 2 divisors, whose sum is σ = 491234102. Its totient is φ = 491234100.

The previous prime is 491234099. The next prime is 491234119. The reversal of 491234101 is 101432194.

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., 314211076 + 177023025 = 17726^2 + 13305^2 .

It is a cyclic number.

It is not a de Polignac number, because 491234101 - 2¹ = 491234099 is a prime.

Together with 491234099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491234701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245617050 + 245617051.

It is an arithmetic number, because the mean of its divisors is an integer number (245617051).

Almost surely, 2^491234101 is an apocalyptic number.

It is an amenable number.

491234101 is a deficient number, since it is larger than the sum of its proper divisors (1).

491234101 is an equidigital number, since it uses as much as digits as its factorization.

491234101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 491234101 is about 22163.8015917847. The cubic root of 491234101 is about 789.0348203140.

Adding to 491234101 its reverse (101432194), we get a palindrome (592666295).

The spelling of 491234101 in words is "four hundred ninety-one million, two hundred thirty-four thousand, one hundred one".