1408646677 has 2 divisors, whose sum is σ = 1408646678. Its totient is φ = 1408646676.

The previous prime is 1408646663. The next prime is 1408646689. The reversal of 1408646677 is 7766468041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 984327876 + 424318801 = 31374^2 + 20599^2 .

It is an emirp because it is prime and its reverse (7766468041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1408646677 - 2²⁷ = 1274428949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1408646677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1408646627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704323338 + 704323339.

It is an arithmetic number, because the mean of its divisors is an integer number (704323339).

Almost surely, 2^1408646677 is an apocalyptic number.

It is an amenable number.

1408646677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1408646677 is an equidigital number, since it uses as much as digits as its factorization.

1408646677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 1408646677 is about 37531.9420893724. The cubic root of 1408646677 is about 1120.9872982704.

The spelling of 1408646677 in words is "one billion, four hundred eight million, six hundred forty-six thousand, six hundred seventy-seven".