690846409 has 8 divisors (see below), whose sum is σ = 755534880. Its totient is φ = 626472000.

The previous prime is 690846407. The next prime is 690846419. The reversal of 690846409 is 904648096.

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

It is not a de Polignac number, because 690846409 - 2¹ = 690846407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690846407) 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, 73899 + ... + 82720.

It is an arithmetic number, because the mean of its divisors is an integer number (94441860).

Almost surely, 2^690846409 is an apocalyptic number.

It is an amenable number.

690846409 is a deficient number, since it is larger than the sum of its proper divisors (64688471).

690846409 is a wasteful number, since it uses less digits than its factorization.

690846409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157031.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 690846409 is about 26283.9572553297. The cubic root of 690846409 is about 884.0167653946.

The spelling of 690846409 in words is "six hundred ninety million, eight hundred forty-six thousand, four hundred nine".