783378481 has 2 divisors, whose sum is σ = 783378482. Its totient is φ = 783378480.

The previous prime is 783378451. The next prime is 783378503. The reversal of 783378481 is 184873387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 770562081 + 12816400 = 27759^2 + 3580^2 .

It is a cyclic number.

It is not a de Polignac number, because 783378481 - 2⁷ = 783378353 is a prime.

It is a super-2 number, since 2×783378481² = 1227363688987734722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (783378451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391689240 + 391689241.

It is an arithmetic number, because the mean of its divisors is an integer number (391689241).

Almost surely, 2^783378481 is an apocalyptic number.

It is an amenable number.

783378481 is a deficient number, since it is larger than the sum of its proper divisors (1).

783378481 is an equidigital number, since it uses as much as digits as its factorization.

783378481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 49.

The square root of 783378481 is about 27988.8992459511. The cubic root of 783378481 is about 921.8435312610.

The spelling of 783378481 in words is "seven hundred eighty-three million, three hundred seventy-eight thousand, four hundred eighty-one".