1839690961 has 2 divisors, whose sum is σ = 1839690962. Its totient is φ = 1839690960.

The previous prime is 1839690947. The next prime is 1839690971. The reversal of 1839690961 is 1690969381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1335463936 + 504227025 = 36544^2 + 22455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1839690961 - 2¹⁷ = 1839559889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1839690899 and 1839690908.

It is not a weakly prime, because it can be changed into another prime (1839690971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919845480 + 919845481.

It is an arithmetic number, because the mean of its divisors is an integer number (919845481).

Almost surely, 2^1839690961 is an apocalyptic number.

It is an amenable number.

1839690961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1839690961 is an equidigital number, since it uses as much as digits as its factorization.

1839690961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 1839690961 is about 42891.6187733688. The cubic root of 1839690961 is about 1225.3165276182.

The spelling of 1839690961 in words is "one billion, eight hundred thirty-nine million, six hundred ninety thousand, nine hundred sixty-one".