780789983 has 2 divisors, whose sum is σ = 780789984. Its totient is φ = 780789982.

The previous prime is 780789973. The next prime is 780790007. The reversal of 780789983 is 389987087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 780789983 - 2⁸ = 780789727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780789913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390394991 + 390394992.

It is an arithmetic number, because the mean of its divisors is an integer number (390394992).

Almost surely, 2^780789983 is an apocalyptic number.

780789983 is a deficient number, since it is larger than the sum of its proper divisors (1).

780789983 is an equidigital number, since it uses as much as digits as its factorization.

780789983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The square root of 780789983 is about 27942.6194727695. The cubic root of 780789983 is about 920.8270693422.

The spelling of 780789983 in words is "seven hundred eighty million, seven hundred eighty-nine thousand, nine hundred eighty-three".