816738473 has 2 divisors, whose sum is σ = 816738474. Its totient is φ = 816738472.

The previous prime is 816738469. The next prime is 816738521. The reversal of 816738473 is 374837618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 785512729 + 31225744 = 28027^2 + 5588^2 .

It is a cyclic number.

It is not a de Polignac number, because 816738473 - 2² = 816738469 is a prime.

It is not a weakly prime, because it can be changed into another prime (816338473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408369236 + 408369237.

It is an arithmetic number, because the mean of its divisors is an integer number (408369237).

Almost surely, 2^816738473 is an apocalyptic number.

It is an amenable number.

816738473 is a deficient number, since it is larger than the sum of its proper divisors (1).

816738473 is an equidigital number, since it uses as much as digits as its factorization.

816738473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The square root of 816738473 is about 28578.6366539763. The cubic root of 816738473 is about 934.7475551709.

The spelling of 816738473 in words is "eight hundred sixteen million, seven hundred thirty-eight thousand, four hundred seventy-three".