1319946401 has 2 divisors, whose sum is σ = 1319946402. Its totient is φ = 1319946400.

The previous prime is 1319946389. The next prime is 1319946469. The reversal of 1319946401 is 1046499131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1318053025 + 1893376 = 36305^2 + 1376^2 .

It is an emirp because it is prime and its reverse (1046499131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1319946401 - 2⁶ = 1319946337 is a prime.

It is not a weakly prime, because it can be changed into another prime (1319946491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659973200 + 659973201.

It is an arithmetic number, because the mean of its divisors is an integer number (659973201).

Almost surely, 2^1319946401 is an apocalyptic number.

It is an amenable number.

1319946401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319946401 is an equidigital number, since it uses as much as digits as its factorization.

1319946401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 1319946401 is about 36331.0666097212. The cubic root of 1319946401 is about 1096.9464628034.

The spelling of 1319946401 in words is "one billion, three hundred nineteen million, nine hundred forty-six thousand, four hundred one".