491950769 has 2 divisors, whose sum is σ = 491950770. Its totient is φ = 491950768.

The previous prime is 491950741. The next prime is 491950801. The reversal of 491950769 is 967059194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 488940544 + 3010225 = 22112^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 491950769 - 2²⁰ = 490902193 is a prime.

It is a super-2 number, since 2×491950769² = 484031118239382722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (491950169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245975384 + 245975385.

It is an arithmetic number, because the mean of its divisors is an integer number (245975385).

Almost surely, 2^491950769 is an apocalyptic number.

It is an amenable number.

491950769 is a deficient number, since it is larger than the sum of its proper divisors (1).

491950769 is an equidigital number, since it uses as much as digits as its factorization.

491950769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 491950769 is about 22179.9632326115. The cubic root of 491950769 is about 789.4183450154.

The spelling of 491950769 in words is "four hundred ninety-one million, nine hundred fifty thousand, seven hundred sixty-nine".