928996781 has 2 divisors, whose sum is σ = 928996782. Its totient is φ = 928996780.

The previous prime is 928996753. The next prime is 928996823. The reversal of 928996781 is 187699829.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 736036900 + 192959881 = 27130^2 + 13891^2 .

It is a cyclic number.

It is not a de Polignac number, because 928996781 - 2¹⁰ = 928995757 is a prime.

It is a super-2 number, since 2×928996781² = 1726070038216723922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 928996781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (928996751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464498390 + 464498391.

It is an arithmetic number, because the mean of its divisors is an integer number (464498391).

Almost surely, 2^928996781 is an apocalyptic number.

It is an amenable number.

928996781 is a deficient number, since it is larger than the sum of its proper divisors (1).

928996781 is an equidigital number, since it uses as much as digits as its factorization.

928996781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 59.

The square root of 928996781 is about 30479.4485022285. The cubic root of 928996781 is about 975.7488985655.

The spelling of 928996781 in words is "nine hundred twenty-eight million, nine hundred ninety-six thousand, seven hundred eighty-one".