690971473 has 2 divisors, whose sum is σ = 690971474. Its totient is φ = 690971472.

The previous prime is 690971471. The next prime is 690971509. The reversal of 690971473 is 374179096.

690971473 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 can be written as a sum of positive squares in only one way, i.e., 680583744 + 10387729 = 26088^2 + 3223^2 .

It is a cyclic number.

It is not a de Polignac number, because 690971473 - 2¹ = 690971471 is a prime.

Together with 690971471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (690971471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345485736 + 345485737.

It is an arithmetic number, because the mean of its divisors is an integer number (345485737).

Almost surely, 2^690971473 is an apocalyptic number.

It is an amenable number.

690971473 is a deficient number, since it is larger than the sum of its proper divisors (1).

690971473 is an equidigital number, since it uses as much as digits as its factorization.

690971473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 690971473 is about 26286.3362414772. The cubic root of 690971473 is about 884.0701067261.

The spelling of 690971473 in words is "six hundred ninety million, nine hundred seventy-one thousand, four hundred seventy-three".