920279729 has 2 divisors, whose sum is σ = 920279730. Its totient is φ = 920279728.

The previous prime is 920279713. The next prime is 920279743. The reversal of 920279729 is 927972029.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 699073600 + 221206129 = 26440^2 + 14873^2 .

It is an emirp because it is prime and its reverse (927972029) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 920279729 - 2⁴ = 920279713 is a prime.

It is not a weakly prime, because it can be changed into another prime (920279779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460139864 + 460139865.

It is an arithmetic number, because the mean of its divisors is an integer number (460139865).

Almost surely, 2^920279729 is an apocalyptic number.

It is an amenable number.

920279729 is a deficient number, since it is larger than the sum of its proper divisors (1).

920279729 is an equidigital number, since it uses as much as digits as its factorization.

920279729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 920279729 is about 30336.1126217582. The cubic root of 920279729 is about 972.6873891648.

The spelling of 920279729 in words is "nine hundred twenty million, two hundred seventy-nine thousand, seven hundred twenty-nine".