1642434533 has 2 divisors, whose sum is σ = 1642434534. Its totient is φ = 1642434532.

The previous prime is 1642434523. The next prime is 1642434581. The reversal of 1642434533 is 3354342461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1583482849 + 58951684 = 39793^2 + 7678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642434533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642434493 and 1642434502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642434503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821217266 + 821217267.

It is an arithmetic number, because the mean of its divisors is an integer number (821217267).

Almost surely, 2^1642434533 is an apocalyptic number.

It is an amenable number.

1642434533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642434533 is an equidigital number, since it uses as much as digits as its factorization.

1642434533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 35.

The square root of 1642434533 is about 40526.9605694777. The cubic root of 1642434533 is about 1179.8569521605.

Adding to 1642434533 its reverse (3354342461), we get a palindrome (4996776994).

The spelling of 1642434533 in words is "one billion, six hundred forty-two million, four hundred thirty-four thousand, five hundred thirty-three".