1628794859 has 2 divisors, whose sum is σ = 1628794860. Its totient is φ = 1628794858.

The previous prime is 1628794829. The next prime is 1628794861. The reversal of 1628794859 is 9584978261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1628794859 - 2⁸ = 1628794603 is a prime.

Together with 1628794861, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1628794798 and 1628794807.

It is not a weakly prime, because it can be changed into another prime (1628794819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814397429 + 814397430.

It is an arithmetic number, because the mean of its divisors is an integer number (814397430).

Almost surely, 2^1628794859 is an apocalyptic number.

1628794859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628794859 is an equidigital number, since it uses as much as digits as its factorization.

1628794859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 59.

The square root of 1628794859 is about 40358.3307261339. The cubic root of 1628794859 is about 1176.5818101843.

The spelling of 1628794859 in words is "one billion, six hundred twenty-eight million, seven hundred ninety-four thousand, eight hundred fifty-nine".