1478680781 has 2 divisors, whose sum is σ = 1478680782. Its totient is φ = 1478680780.

The previous prime is 1478680769. The next prime is 1478680783. The reversal of 1478680781 is 1870868741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1461532900 + 17147881 = 38230^2 + 4141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1478680781 is a prime.

It is a super-2 number, since 2×1478680781² = 4372993704197539922, which contains 22 as substring.

Together with 1478680783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1478680783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739340390 + 739340391.

It is an arithmetic number, because the mean of its divisors is an integer number (739340391).

Almost surely, 2^1478680781 is an apocalyptic number.

It is an amenable number.

1478680781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1478680781 is an equidigital number, since it uses as much as digits as its factorization.

1478680781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 602112, while the sum is 50.

The square root of 1478680781 is about 38453.6185683480. The cubic root of 1478680781 is about 1139.2651417205.

The spelling of 1478680781 in words is "one billion, four hundred seventy-eight million, six hundred eighty thousand, seven hundred eighty-one".