494778877 has 2 divisors, whose sum is σ = 494778878. Its totient is φ = 494778876.

The previous prime is 494778871. The next prime is 494778881. The reversal of 494778877 is 778877494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450543076 + 44235801 = 21226^2 + 6651^2 .

It is a cyclic number.

It is not a de Polignac number, because 494778877 - 2¹¹ = 494776829 is a prime.

It is a super-2 number, since 2×494778877² = 489612274250762258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494778871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247389438 + 247389439.

It is an arithmetic number, because the mean of its divisors is an integer number (247389439).

Almost surely, 2^494778877 is an apocalyptic number.

It is an amenable number.

494778877 is a deficient number, since it is larger than the sum of its proper divisors (1).

494778877 is an equidigital number, since it uses as much as digits as its factorization.

494778877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22127616, while the sum is 61.

The square root of 494778877 is about 22243.6255363194. The cubic root of 494778877 is about 790.9281815924.

The spelling of 494778877 in words is "four hundred ninety-four million, seven hundred seventy-eight thousand, eight hundred seventy-seven".