1020921413 has 2 divisors, whose sum is σ = 1020921414. Its totient is φ = 1020921412.

The previous prime is 1020921373. The next prime is 1020921467. The reversal of 1020921413 is 3141290201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 727758529 + 293162884 = 26977^2 + 17122^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020921413 - 2⁸ = 1020921157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020921113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510460706 + 510460707.

It is an arithmetic number, because the mean of its divisors is an integer number (510460707).

Almost surely, 2^1020921413 is an apocalyptic number.

It is an amenable number.

1020921413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020921413 is an equidigital number, since it uses as much as digits as its factorization.

1020921413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1020921413 is about 31951.8608691262. The cubic root of 1020921413 is about 1006.9257278940.

The spelling of 1020921413 in words is "one billion, twenty million, nine hundred twenty-one thousand, four hundred thirteen".