491794951 has 2 divisors, whose sum is σ = 491794952. Its totient is φ = 491794950.

The previous prime is 491794931. The next prime is 491794969. The reversal of 491794951 is 159497194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491794951 - 2⁹ = 491794439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491794895 and 491794904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491794931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245897475 + 245897476.

It is an arithmetic number, because the mean of its divisors is an integer number (245897476).

Almost surely, 2^491794951 is an apocalyptic number.

491794951 is a deficient number, since it is larger than the sum of its proper divisors (1).

491794951 is an equidigital number, since it uses as much as digits as its factorization.

491794951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 49.

The square root of 491794951 is about 22176.4503697052. The cubic root of 491794951 is about 789.3349907556.

The spelling of 491794951 in words is "four hundred ninety-one million, seven hundred ninety-four thousand, nine hundred fifty-one".