920291201789 has 2 divisors, whose sum is σ = 920291201790. Its totient is φ = 920291201788.

The previous prime is 920291201747. The next prime is 920291201821. The reversal of 920291201789 is 987102192029.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 507311458564 + 412979743225 = 712258^2 + 642635^2 .

It is a cyclic number.

It is not a de Polignac number, because 920291201789 - 2²⁰ = 920290153213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (920291291789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460145600894 + 460145600895.

It is an arithmetic number, because the mean of its divisors is an integer number (460145600895).

Almost surely, 2^920291201789 is an apocalyptic number.

It is an amenable number.

920291201789 is a deficient number, since it is larger than the sum of its proper divisors (1).

920291201789 is an equidigital number, since it uses as much as digits as its factorization.

920291201789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 920291201789 in words is "nine hundred twenty billion, two hundred ninety-one million, two hundred one thousand, seven hundred eighty-nine".