690689196 has 18 divisors (see below), whose sum is σ = 1745908892. Its totient is φ = 230229720.

The previous prime is 690689183. The next prime is 690689227. The reversal of 690689196 is 691986096.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×690689196² = 954103130942252832, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9592870 + ... + 9592941.

Almost surely, 2^690689196 is an apocalyptic number.

It is an amenable number.

690689196 is an abundant number, since it is smaller than the sum of its proper divisors (1055219696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690689196 is a wasteful number, since it uses less digits than its factorization.

690689196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19185821 (or 19185816 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The square root of 690689196 is about 26280.9664205866. The cubic root of 690689196 is about 883.9497029865.

The spelling of 690689196 in words is "six hundred ninety million, six hundred eighty-nine thousand, one hundred ninety-six".