1020920897 has 2 divisors, whose sum is σ = 1020920898. Its totient is φ = 1020920896.

The previous prime is 1020920893. The next prime is 1020920899. The reversal of 1020920897 is 7980290201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 936115216 + 84805681 = 30596^2 + 9209^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020920897 - 2² = 1020920893 is a prime.

Together with 1020920899, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020920897.

It is not a weakly prime, because it can be changed into another prime (1020920893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510460448 + 510460449.

It is an arithmetic number, because the mean of its divisors is an integer number (510460449).

Almost surely, 2^1020920897 is an apocalyptic number.

It is an amenable number.

1020920897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020920897 is an equidigital number, since it uses as much as digits as its factorization.

1020920897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1020920897 is about 31951.8527944781. The cubic root of 1020920897 is about 1006.9255582519.

The spelling of 1020920897 in words is "one billion, twenty million, nine hundred twenty thousand, eight hundred ninety-seven".