690290242 has 8 divisors (see below), whose sum is σ = 1044935100. Its totient is φ = 341978544.

The previous prime is 690290231. The next prime is 690290267. The reversal of 690290242 is 242092096.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 689535081 + 755161 = 26259^2 + 869^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 690290198 and 690290207.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1583017 + ... + 1583452.

Almost surely, 2^690290242 is an apocalyptic number.

690290242 is a deficient number, since it is larger than the sum of its proper divisors (354644858).

690290242 is a wasteful number, since it uses less digits than its factorization.

690290242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166580.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 690290242 is about 26273.3751543269. The cubic root of 690290242 is about 883.7794753388.

The spelling of 690290242 in words is "six hundred ninety million, two hundred ninety thousand, two hundred forty-two".