1021490893 has 2 divisors, whose sum is σ = 1021490894. Its totient is φ = 1021490892.

The previous prime is 1021490753. The next prime is 1021490947. The reversal of 1021490893 is 3980941201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988347844 + 33143049 = 31438^2 + 5757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021490893 - 2⁹ = 1021490381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021490593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510745446 + 510745447.

It is an arithmetic number, because the mean of its divisors is an integer number (510745447).

Almost surely, 2^1021490893 is an apocalyptic number.

It is an amenable number.

1021490893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021490893 is an equidigital number, since it uses as much as digits as its factorization.

1021490893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1021490893 is about 31960.7711577803. The cubic root of 1021490893 is about 1007.1129174493.

The spelling of 1021490893 in words is "one billion, twenty-one million, four hundred ninety thousand, eight hundred ninety-three".