783720997 has 2 divisors, whose sum is σ = 783720998. Its totient is φ = 783720996.

The previous prime is 783720991. The next prime is 783721007. The reversal of 783720997 is 799027387.

It is a happy number.

783720997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 716579361 + 67141636 = 26769^2 + 8194^2 .

It is a cyclic number.

It is not a de Polignac number, because 783720997 - 2³ = 783720989 is a prime.

It is a super-2 number, since 2×783720997² = 1228437202277348018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (783720991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391860498 + 391860499.

It is an arithmetic number, because the mean of its divisors is an integer number (391860499).

Almost surely, 2^783720997 is an apocalyptic number.

It is an amenable number.

783720997 is a deficient number, since it is larger than the sum of its proper divisors (1).

783720997 is an equidigital number, since it uses as much as digits as its factorization.

783720997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1333584, while the sum is 52.

The square root of 783720997 is about 27995.0173602375. The cubic root of 783720997 is about 921.9778640090.

The spelling of 783720997 in words is "seven hundred eighty-three million, seven hundred twenty thousand, nine hundred ninety-seven".