920693321 has 2 divisors, whose sum is σ = 920693322. Its totient is φ = 920693320.

The previous prime is 920693309. The next prime is 920693383. The reversal of 920693321 is 123396029.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 786017296 + 134676025 = 28036^2 + 11605^2 .

It is an emirp because it is prime and its reverse (123396029) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920693321 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (920693821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460346660 + 460346661.

It is an arithmetic number, because the mean of its divisors is an integer number (460346661).

Almost surely, 2^920693321 is an apocalyptic number.

It is an amenable number.

920693321 is a deficient number, since it is larger than the sum of its proper divisors (1).

920693321 is an equidigital number, since it uses as much as digits as its factorization.

920693321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 920693321 is about 30342.9286819845. The cubic root of 920693321 is about 972.8330823558.

The spelling of 920693321 in words is "nine hundred twenty million, six hundred ninety-three thousand, three hundred twenty-one".