1028620877 has 2 divisors, whose sum is σ = 1028620878. Its totient is φ = 1028620876.

The previous prime is 1028620871. The next prime is 1028620907. The reversal of 1028620877 is 7780268201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 970571716 + 58049161 = 31154^2 + 7619^2 .

It is an emirp because it is prime and its reverse (7780268201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1028620877 - 2¹² = 1028616781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1028620871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514310438 + 514310439.

It is an arithmetic number, because the mean of its divisors is an integer number (514310439).

Almost surely, 2^1028620877 is an apocalyptic number.

It is an amenable number.

1028620877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028620877 is an equidigital number, since it uses as much as digits as its factorization.

1028620877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 1028620877 is about 32072.1199330509. The cubic root of 1028620877 is about 1009.4506953262.

The spelling of 1028620877 in words is "one billion, twenty-eight million, six hundred twenty thousand, eight hundred seventy-seven".