239350021 has 8 divisors (see below), whose sum is σ = 262168920. Its totient is φ = 217502208.

The previous prime is 239350009. The next prime is 239350037. The reversal of 239350021 is 120053932.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49984900 + 189365121 = 7070^2 + 13761^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 239350021 - 2⁵ = 239349989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239350081) 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, 242256 + ... + 243241.

It is an arithmetic number, because the mean of its divisors is an integer number (32771115).

Almost surely, 2^239350021 is an apocalyptic number.

It is an amenable number.

239350021 is a deficient number, since it is larger than the sum of its proper divisors (22818899).

239350021 is a wasteful number, since it uses less digits than its factorization.

239350021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485543.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 239350021 is about 15470.9411801610. The cubic root of 239350021 is about 620.8849840106.

The spelling of 239350021 in words is "two hundred thirty-nine million, three hundred fifty thousand, twenty-one".