1478971309 has 2 divisors, whose sum is σ = 1478971310. Its totient is φ = 1478971308.

The previous prime is 1478971279. The next prime is 1478971331. The reversal of 1478971309 is 9031798741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1070729284 + 408242025 = 32722^2 + 20205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1478971309 - 2⁷ = 1478971181 is a prime.

It is a super-2 number, since 2×1478971309² = 4374712265690346962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1478971379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739485654 + 739485655.

It is an arithmetic number, because the mean of its divisors is an integer number (739485655).

Almost surely, 2^1478971309 is an apocalyptic number.

It is an amenable number.

1478971309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1478971309 is an equidigital number, since it uses as much as digits as its factorization.

1478971309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 1478971309 is about 38457.3960246921. The cubic root of 1478971309 is about 1139.3397502843.

The spelling of 1478971309 in words is "one billion, four hundred seventy-eight million, nine hundred seventy-one thousand, three hundred nine".