690889763 has 2 divisors, whose sum is σ = 690889764. Its totient is φ = 690889762.

The previous prime is 690889747. The next prime is 690889781. The reversal of 690889763 is 367988096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690889763 - 2⁴ = 690889747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 690889699 and 690889708.

It is not a weakly prime, because it can be changed into another prime (690889733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345444881 + 345444882.

It is an arithmetic number, because the mean of its divisors is an integer number (345444882).

Almost surely, 2^690889763 is an apocalyptic number.

690889763 is a deficient number, since it is larger than the sum of its proper divisors (1).

690889763 is an equidigital number, since it uses as much as digits as its factorization.

690889763 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 690889763 is about 26284.7819659970. The cubic root of 690889763 is about 884.0352571368.

The spelling of 690889763 in words is "six hundred ninety million, eight hundred eighty-nine thousand, seven hundred sixty-three".