1838657741 has 2 divisors, whose sum is σ = 1838657742. Its totient is φ = 1838657740.

The previous prime is 1838657731. The next prime is 1838657783. The reversal of 1838657741 is 1477568381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1699912900 + 138744841 = 41230^2 + 11779^2 .

It is an emirp because it is prime and its reverse (1477568381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1838657741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1838657741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838657731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919328870 + 919328871.

It is an arithmetic number, because the mean of its divisors is an integer number (919328871).

Almost surely, 2^1838657741 is an apocalyptic number.

It is an amenable number.

1838657741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838657741 is an equidigital number, since it uses as much as digits as its factorization.

1838657741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 50.

The square root of 1838657741 is about 42879.5725375149. The cubic root of 1838657741 is about 1225.0870944046.

The spelling of 1838657741 in words is "one billion, eight hundred thirty-eight million, six hundred fifty-seven thousand, seven hundred forty-one".