1878022361 has 2 divisors, whose sum is σ = 1878022362. Its totient is φ = 1878022360.

The previous prime is 1878022337. The next prime is 1878022379. The reversal of 1878022361 is 1632208781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1430276761 + 447745600 = 37819^2 + 21160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1878022361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1878022331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 939011180 + 939011181.

It is an arithmetic number, because the mean of its divisors is an integer number (939011181).

Almost surely, 2^1878022361 is an apocalyptic number.

It is an amenable number.

1878022361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1878022361 is an equidigital number, since it uses as much as digits as its factorization.

1878022361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 1878022361 is about 43336.1553555458. The cubic root of 1878022361 is about 1233.7682399912.

The spelling of 1878022361 in words is "one billion, eight hundred seventy-eight million, twenty-two thousand, three hundred sixty-one".