690796489 has 2 divisors, whose sum is σ = 690796490. Its totient is φ = 690796488.

The previous prime is 690796481. The next prime is 690796493. The reversal of 690796489 is 984697096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690796089 + 400 = 26283^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 690796489 - 2³ = 690796481 is a prime.

It is not a weakly prime, because it can be changed into another prime (690796481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345398244 + 345398245.

It is an arithmetic number, because the mean of its divisors is an integer number (345398245).

Almost surely, 2^690796489 is an apocalyptic number.

It is an amenable number.

690796489 is a deficient number, since it is larger than the sum of its proper divisors (1).

690796489 is an equidigital number, since it uses as much as digits as its factorization.

690796489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The square root of 690796489 is about 26283.0076094803. The cubic root of 690796489 is about 883.9954721041.

The spelling of 690796489 in words is "six hundred ninety million, seven hundred ninety-six thousand, four hundred eighty-nine".