492778393 has 2 divisors, whose sum is σ = 492778394. Its totient is φ = 492778392.

The previous prime is 492778373. The next prime is 492778399. The reversal of 492778393 is 393877294.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488056464 + 4721929 = 22092^2 + 2173^2 .

It is a cyclic number.

It is not a de Polignac number, because 492778393 - 2¹⁷ = 492647321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 492778393.

It is not a weakly prime, because it can be changed into another prime (492778399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246389196 + 246389197.

It is an arithmetic number, because the mean of its divisors is an integer number (246389197).

Almost surely, 2^492778393 is an apocalyptic number.

It is an amenable number.

492778393 is a deficient number, since it is larger than the sum of its proper divisors (1).

492778393 is an equidigital number, since it uses as much as digits as its factorization.

492778393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 52.

The square root of 492778393 is about 22198.6124115901. The cubic root of 492778393 is about 789.8607846338.

The spelling of 492778393 in words is "four hundred ninety-two million, seven hundred seventy-eight thousand, three hundred ninety-three".