491614129 has 2 divisors, whose sum is σ = 491614130. Its totient is φ = 491614128.

The previous prime is 491614117. The next prime is 491614147. The reversal of 491614129 is 921416194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264810529 + 226803600 = 16273^2 + 15060^2 .

It is a cyclic number.

It is not a de Polignac number, because 491614129 - 2⁷ = 491614001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (491614429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245807064 + 245807065.

It is an arithmetic number, because the mean of its divisors is an integer number (245807065).

Almost surely, 2^491614129 is an apocalyptic number.

It is an amenable number.

491614129 is a deficient number, since it is larger than the sum of its proper divisors (1).

491614129 is an equidigital number, since it uses as much as digits as its factorization.

491614129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 491614129 is about 22172.3731025797. The cubic root of 491614129 is about 789.2382386250.

The spelling of 491614129 in words is "four hundred ninety-one million, six hundred fourteen thousand, one hundred twenty-nine".