1378056061 has 2 divisors, whose sum is σ = 1378056062. Its totient is φ = 1378056060.

The previous prime is 1378056047. The next prime is 1378056077. The reversal of 1378056061 is 1606508731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1150227225 + 227828836 = 33915^2 + 15094^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378056061 - 2¹⁹ = 1377531773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1378056061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378056161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689028030 + 689028031.

It is an arithmetic number, because the mean of its divisors is an integer number (689028031).

Almost surely, 2^1378056061 is an apocalyptic number.

It is an amenable number.

1378056061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378056061 is an equidigital number, since it uses as much as digits as its factorization.

1378056061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1378056061 is about 37122.1774819312. The cubic root of 1378056061 is about 1112.8132682741.

The spelling of 1378056061 in words is "one billion, three hundred seventy-eight million, fifty-six thousand, sixty-one".