690923671 has 2 divisors, whose sum is σ = 690923672. Its totient is φ = 690923670.

The previous prime is 690923669. The next prime is 690923687. The reversal of 690923671 is 176329096.

690923671 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 690923671 - 2¹ = 690923669 is a prime.

Together with 690923669, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690023671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345461835 + 345461836.

It is an arithmetic number, because the mean of its divisors is an integer number (345461836).

Almost surely, 2^690923671 is an apocalyptic number.

690923671 is a deficient number, since it is larger than the sum of its proper divisors (1).

690923671 is an equidigital number, since it uses as much as digits as its factorization.

690923671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 690923671 is about 26285.4269700912. The cubic root of 690923671 is about 884.0497193462.

The spelling of 690923671 in words is "six hundred ninety million, nine hundred twenty-three thousand, six hundred seventy-one".