1642019437 has 2 divisors, whose sum is σ = 1642019438. Its totient is φ = 1642019436.

The previous prime is 1642019429. The next prime is 1642019479. The reversal of 1642019437 is 7349102461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1466430436 + 175589001 = 38294^2 + 13251^2 .

It is an emirp because it is prime and its reverse (7349102461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1642019437 - 2³ = 1642019429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642019396 and 1642019405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642019417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821009718 + 821009719.

It is an arithmetic number, because the mean of its divisors is an integer number (821009719).

Almost surely, 2^1642019437 is an apocalyptic number.

It is an amenable number.

1642019437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642019437 is an equidigital number, since it uses as much as digits as its factorization.

1642019437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1642019437 is about 40521.8390130557. The cubic root of 1642019437 is about 1179.7575478604.

The spelling of 1642019437 in words is "one billion, six hundred forty-two million, nineteen thousand, four hundred thirty-seven".