491447741 has 2 divisors, whose sum is σ = 491447742. Its totient is φ = 491447740.

The previous prime is 491447707. The next prime is 491447779. The reversal of 491447741 is 147744194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490799716 + 648025 = 22154^2 + 805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491447741 is a prime.

It is a super-3 number, since 3×491447741³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491447701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245723870 + 245723871.

It is an arithmetic number, because the mean of its divisors is an integer number (245723871).

Almost surely, 2^491447741 is an apocalyptic number.

It is an amenable number.

491447741 is a deficient number, since it is larger than the sum of its proper divisors (1).

491447741 is an equidigital number, since it uses as much as digits as its factorization.

491447741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 41.

The square root of 491447741 is about 22168.6206381904. The cubic root of 491447741 is about 789.1491887094.

The spelling of 491447741 in words is "four hundred ninety-one million, four hundred forty-seven thousand, seven hundred forty-one".