1838854697 has 2 divisors, whose sum is σ = 1838854698. Its totient is φ = 1838854696.

The previous prime is 1838854673. The next prime is 1838854739. The reversal of 1838854697 is 7964588381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1833638041 + 5216656 = 42821^2 + 2284^2 .

It is an emirp because it is prime and its reverse (7964588381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1838854697 - 2²⁰ = 1837806121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1838854607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919427348 + 919427349.

It is an arithmetic number, because the mean of its divisors is an integer number (919427349).

Almost surely, 2^1838854697 is an apocalyptic number.

It is an amenable number.

1838854697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838854697 is an equidigital number, since it uses as much as digits as its factorization.

1838854697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 59.

The square root of 1838854697 is about 42881.8690940589. The cubic root of 1838854697 is about 1225.1308363934.

The spelling of 1838854697 in words is "one billion, eight hundred thirty-eight million, eight hundred fifty-four thousand, six hundred ninety-seven".