1020658091 has 2 divisors, whose sum is σ = 1020658092. Its totient is φ = 1020658090.

The previous prime is 1020658081. The next prime is 1020658123. The reversal of 1020658091 is 1908560201.

1020658091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (1020658123) can be obtained adding 1020658091 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020658091 - 2²² = 1016463787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1020658031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510329045 + 510329046.

It is an arithmetic number, because the mean of its divisors is an integer number (510329046).

Almost surely, 2^1020658091 is an apocalyptic number.

1020658091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020658091 is an equidigital number, since it uses as much as digits as its factorization.

1020658091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1020658091 is about 31947.7399983160. The cubic root of 1020658091 is about 1006.8391497329.

The spelling of 1020658091 in words is "one billion, twenty million, six hundred fifty-eight thousand, ninety-one".