690978471 has 16 divisors (see below), whose sum is σ = 931676160. Its totient is φ = 455479200.

The previous prime is 690978451. The next prime is 690978473. The reversal of 690978471 is 174879096.

It is not a de Polignac number, because 690978471 - 2¹⁹ = 690454183 is a prime.

It is a super-3 number, since 3×690978471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690978473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386646 + ... + 388428.

It is an arithmetic number, because the mean of its divisors is an integer number (58229760).

Almost surely, 2^690978471 is an apocalyptic number.

690978471 is a deficient number, since it is larger than the sum of its proper divisors (240697689).

690978471 is a wasteful number, since it uses less digits than its factorization.

690978471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 690978471 is about 26286.4693521211. The cubic root of 690978471 is about 884.0730912688.

The spelling of 690978471 in words is "six hundred ninety million, nine hundred seventy-eight thousand, four hundred seventy-one".