1879860121 has 2 divisors, whose sum is σ = 1879860122. Its totient is φ = 1879860120.

The previous prime is 1879860079. The next prime is 1879860149. The reversal of 1879860121 is 1210689781.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1563411600 + 316448521 = 39540^2 + 17789^2 .

It is a cyclic number.

It is not a de Polignac number, because 1879860121 - 2¹⁹ = 1879335833 is a prime.

It is a super-2 number, since 2×1879860121² = 7067748149052269282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1879860821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 939930060 + 939930061.

It is an arithmetic number, because the mean of its divisors is an integer number (939930061).

Almost surely, 2^1879860121 is an apocalyptic number.

It is an amenable number.

1879860121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1879860121 is an equidigital number, since it uses as much as digits as its factorization.

1879860121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 43.

The square root of 1879860121 is about 43357.3537130669. The cubic root of 1879860121 is about 1234.1705480756.

The spelling of 1879860121 in words is "one billion, eight hundred seventy-nine million, eight hundred sixty thousand, one hundred twenty-one".