475156813 has 2 divisors, whose sum is σ = 475156814. Its totient is φ = 475156812.

The previous prime is 475156777. The next prime is 475156841. The reversal of 475156813 is 318651574.

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., 468203044 + 6953769 = 21638^2 + 2637^2 .

It is a cyclic number.

It is not a de Polignac number, because 475156813 - 2¹³ = 475148621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475156853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237578406 + 237578407.

It is an arithmetic number, because the mean of its divisors is an integer number (237578407).

Almost surely, 2^475156813 is an apocalyptic number.

It is an amenable number.

475156813 is a deficient number, since it is larger than the sum of its proper divisors (1).

475156813 is an equidigital number, since it uses as much as digits as its factorization.

475156813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 40.

The square root of 475156813 is about 21798.0919577838. The cubic root of 475156813 is about 780.3312273935.

The spelling of 475156813 in words is "four hundred seventy-five million, one hundred fifty-six thousand, eight hundred thirteen".