1642303549 has 4 divisors (see below), whose sum is σ = 1669226620. Its totient is φ = 1615380480.

The previous prime is 1642303493. The next prime is 1642303573. The reversal of 1642303549 is 9453032461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 118962649 + 1523340900 = 10907^2 + 39030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642303549 - 2¹¹ = 1642301501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642303049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13461444 + ... + 13461565.

It is an arithmetic number, because the mean of its divisors is an integer number (417306655).

Almost surely, 2^1642303549 is an apocalyptic number.

It is an amenable number.

1642303549 is a deficient number, since it is larger than the sum of its proper divisors (26923071).

1642303549 is an equidigital number, since it uses as much as digits as its factorization.

1642303549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26923070.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 1642303549 is about 40525.3445266046. The cubic root of 1642303549 is about 1179.8255868330.

The spelling of 1642303549 in words is "one billion, six hundred forty-two million, three hundred three thousand, five hundred forty-nine".