690194969 has 8 divisors (see below), whose sum is σ = 731400000. Its totient is φ = 649477872.

The previous prime is 690194941. The next prime is 690194977. The reversal of 690194969 is 969491096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690194969 is a prime.

It is a super-2 number, since 2×690194969² = 952738190465821922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 690194969.

It is not an unprimeable number, because it can be changed into a prime (690194069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119069 + ... + 124730.

It is an arithmetic number, because the mean of its divisors is an integer number (91425000).

Almost surely, 2^690194969 is an apocalyptic number.

It is an amenable number.

690194969 is a deficient number, since it is larger than the sum of its proper divisors (41205031).

690194969 is a wasteful number, since it uses less digits than its factorization.

690194969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243967.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 690194969 is about 26271.5619824935. The cubic root of 690194969 is about 883.7388140870.

The spelling of 690194969 in words is "six hundred ninety million, one hundred ninety-four thousand, nine hundred sixty-nine".