1493503021 has 2 divisors, whose sum is σ = 1493503022. Its totient is φ = 1493503020.

The previous prime is 1493503019. The next prime is 1493503031. The reversal of 1493503021 is 1203053941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1458858025 + 34644996 = 38195^2 + 5886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493503021 - 2¹ = 1493503019 is a prime.

It is a super-2 number, since 2×1493503021² = 4461102547472252882, which contains 22 as substring.

Together with 1493503019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493503001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746751510 + 746751511.

It is an arithmetic number, because the mean of its divisors is an integer number (746751511).

Almost surely, 2^1493503021 is an apocalyptic number.

It is an amenable number.

1493503021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493503021 is an equidigital number, since it uses as much as digits as its factorization.

1493503021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1493503021 is about 38645.8668035794. The cubic root of 1493503021 is about 1143.0591430168.

Adding to 1493503021 its reverse (1203053941), we get a palindrome (2696556962).

The spelling of 1493503021 in words is "one billion, four hundred ninety-three million, five hundred three thousand, twenty-one".