1493584021 has 2 divisors, whose sum is σ = 1493584022. Its totient is φ = 1493584020.

The previous prime is 1493583991. The next prime is 1493584063. The reversal of 1493584021 is 1204853941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1287804996 + 205779025 = 35886^2 + 14345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493584021 - 2⁵ = 1493583989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493584321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746792010 + 746792011.

It is an arithmetic number, because the mean of its divisors is an integer number (746792011).

Almost surely, 2^1493584021 is an apocalyptic number.

It is an amenable number.

1493584021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493584021 is an equidigital number, since it uses as much as digits as its factorization.

1493584021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1493584021 is about 38646.9147668996. The cubic root of 1493584021 is about 1143.0798072127.

The spelling of 1493584021 in words is "one billion, four hundred ninety-three million, five hundred eighty-four thousand, twenty-one".