1319946553 has 2 divisors, whose sum is σ = 1319946554. Its totient is φ = 1319946552.

The previous prime is 1319946539. The next prime is 1319946673. The reversal of 1319946553 is 3556499131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 697593744 + 622352809 = 26412^2 + 24947^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1319946553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1319946253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659973276 + 659973277.

It is an arithmetic number, because the mean of its divisors is an integer number (659973277).

Almost surely, 2^1319946553 is an apocalyptic number.

It is an amenable number.

1319946553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319946553 is an equidigital number, since it uses as much as digits as its factorization.

1319946553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 437400, while the sum is 46.

The square root of 1319946553 is about 36331.0687015948. The cubic root of 1319946553 is about 1096.9465049101.

The spelling of 1319946553 in words is "one billion, three hundred nineteen million, nine hundred forty-six thousand, five hundred fifty-three".