1906340819 has 2 divisors, whose sum is σ = 1906340820. Its totient is φ = 1906340818.

The previous prime is 1906340773. The next prime is 1906340827. The reversal of 1906340819 is 9180436091.

It is a strong prime.

It is an emirp because it is prime and its reverse (9180436091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1906340819 - 2²⁴ = 1889563603 is a prime.

It is a super-2 number, since 2×1906340819² = 7268270636371181522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1906340519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953170409 + 953170410.

It is an arithmetic number, because the mean of its divisors is an integer number (953170410).

Almost surely, 2^1906340819 is an apocalyptic number.

1906340819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906340819 is an equidigital number, since it uses as much as digits as its factorization.

1906340819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1906340819 is about 43661.6630352074. The cubic root of 1906340819 is about 1239.9386066985.

The spelling of 1906340819 in words is "one billion, nine hundred six million, three hundred forty thousand, eight hundred nineteen".