920356817 has 2 divisors, whose sum is σ = 920356818. Its totient is φ = 920356816.

The previous prime is 920356813. The next prime is 920356859. The reversal of 920356817 is 718653029.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 464790481 + 455566336 = 21559^2 + 21344^2 .

It is an emirp because it is prime and its reverse (718653029) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 920356817 - 2² = 920356813 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (920356813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460178408 + 460178409.

It is an arithmetic number, because the mean of its divisors is an integer number (460178409).

Almost surely, 2^920356817 is an apocalyptic number.

It is an amenable number.

920356817 is a deficient number, since it is larger than the sum of its proper divisors (1).

920356817 is an equidigital number, since it uses as much as digits as its factorization.

920356817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 920356817 is about 30337.3831600552. The cubic root of 920356817 is about 972.7145477303.

The spelling of 920356817 in words is "nine hundred twenty million, three hundred fifty-six thousand, eight hundred seventeen".