920620691 has 2 divisors, whose sum is σ = 920620692. Its totient is φ = 920620690.

The previous prime is 920620667. The next prime is 920620693. The reversal of 920620691 is 196026029.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 920620691 - 2⁶ = 920620627 is a prime.

It is a Sophie Germain prime.

Together with 920620693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (920620693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460310345 + 460310346.

It is an arithmetic number, because the mean of its divisors is an integer number (460310346).

Almost surely, 2^920620691 is an apocalyptic number.

920620691 is a deficient number, since it is larger than the sum of its proper divisors (1).

920620691 is an equidigital number, since it uses as much as digits as its factorization.

920620691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 920620691 is about 30341.7318391683. The cubic root of 920620691 is about 972.8075006472.

The spelling of 920620691 in words is "nine hundred twenty million, six hundred twenty thousand, six hundred ninety-one".