1867680641 has 2 divisors, whose sum is σ = 1867680642. Its totient is φ = 1867680640.

The previous prime is 1867680547. The next prime is 1867680697. The reversal of 1867680641 is 1460867681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1076102416 + 791578225 = 32804^2 + 28135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1867680641 - 2¹⁰ = 1867679617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1867680541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933840320 + 933840321.

It is an arithmetic number, because the mean of its divisors is an integer number (933840321).

Almost surely, 2^1867680641 is an apocalyptic number.

It is an amenable number.

1867680641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1867680641 is an equidigital number, since it uses as much as digits as its factorization.

1867680641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 1867680641 is about 43216.6708690061. The cubic root of 1867680641 is about 1231.4994032946.

The spelling of 1867680641 in words is "one billion, eight hundred sixty-seven million, six hundred eighty thousand, six hundred forty-one".