1028677817 has 2 divisors, whose sum is σ = 1028677818. Its totient is φ = 1028677816.

The previous prime is 1028677813. The next prime is 1028677883. The reversal of 1028677817 is 7187768201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654796921 + 373880896 = 25589^2 + 19336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028677817 - 2² = 1028677813 is a prime.

It is not a weakly prime, because it can be changed into another prime (1028677813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514338908 + 514338909.

It is an arithmetic number, because the mean of its divisors is an integer number (514338909).

Almost surely, 2^1028677817 is an apocalyptic number.

It is an amenable number.

1028677817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028677817 is an equidigital number, since it uses as much as digits as its factorization.

1028677817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 263424, while the sum is 47.

The square root of 1028677817 is about 32073.0076076442. The cubic root of 1028677817 is about 1009.4693212564.

The spelling of 1028677817 in words is "one billion, twenty-eight million, six hundred seventy-seven thousand, eight hundred seventeen".