1642303493 has 2 divisors, whose sum is σ = 1642303494. Its totient is φ = 1642303492.

The previous prime is 1642303471. The next prime is 1642303573. The reversal of 1642303493 is 3943032461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1244819524 + 397483969 = 35282^2 + 19937^2 .

It is an emirp because it is prime and its reverse (3943032461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1642303493 - 2¹⁴ = 1642287109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642303463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821151746 + 821151747.

It is an arithmetic number, because the mean of its divisors is an integer number (821151747).

Almost surely, 2^1642303493 is an apocalyptic number.

It is an amenable number.

1642303493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642303493 is an equidigital number, since it uses as much as digits as its factorization.

1642303493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 1642303493 is about 40525.3438356789. The cubic root of 1642303493 is about 1179.8255734229.

The spelling of 1642303493 in words is "one billion, six hundred forty-two million, three hundred three thousand, four hundred ninety-three".