690779783 has 2 divisors, whose sum is σ = 690779784. Its totient is φ = 690779782.

The previous prime is 690779773. The next prime is 690779807. The reversal of 690779783 is 387977096.

690779783 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 is a cyclic number.

It is not a de Polignac number, because 690779783 - 2¹⁴ = 690763399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690779773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345389891 + 345389892.

It is an arithmetic number, because the mean of its divisors is an integer number (345389892).

Almost surely, 2^690779783 is an apocalyptic number.

690779783 is a deficient number, since it is larger than the sum of its proper divisors (1).

690779783 is an equidigital number, since it uses as much as digits as its factorization.

690779783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000752, while the sum is 56.

The square root of 690779783 is about 26282.6897976596. The cubic root of 690779783 is about 883.9883459593.

The spelling of 690779783 in words is "six hundred ninety million, seven hundred seventy-nine thousand, seven hundred eighty-three".