690820361 has 8 divisors (see below), whose sum is σ = 861282624. Its totient is φ = 538301520.

The previous prime is 690820349. The next prime is 690820363. The reversal of 690820361 is 163028096.

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-690820361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (690820363) 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, 4485770 + ... + 4485923.

It is an arithmetic number, because the mean of its divisors is an integer number (107660328).

Almost surely, 2^690820361 is an apocalyptic number.

It is an amenable number.

690820361 is a deficient number, since it is larger than the sum of its proper divisors (170462263).

690820361 is a wasteful number, since it uses less digits than its factorization.

690820361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8971711.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 690820361 is about 26283.4617392763. The cubic root of 690820361 is about 884.0056547928.

The spelling of 690820361 in words is "six hundred ninety million, eight hundred twenty thousand, three hundred sixty-one".