690418947 has 4 divisors (see below), whose sum is σ = 920558600. Its totient is φ = 460279296.

The previous prime is 690418919. The next prime is 690418997. The reversal of 690418947 is 749814096.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 690418947 - 2⁷ = 690418819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690418896 and 690418905.

It is not an unprimeable number, because it can be changed into a prime (690418907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115069822 + ... + 115069827.

It is an arithmetic number, because the mean of its divisors is an integer number (230139650).

Almost surely, 2^690418947 is an apocalyptic number.

690418947 is a deficient number, since it is larger than the sum of its proper divisors (230139653).

690418947 is a wasteful number, since it uses less digits than its factorization.

690418947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230139652.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 690418947 is about 26275.8243828809. The cubic root of 690418947 is about 883.8343989838.

The spelling of 690418947 in words is "six hundred ninety million, four hundred eighteen thousand, nine hundred forty-seven".