650802121 has 4 divisors (see below), whose sum is σ = 650933712. Its totient is φ = 650670532.

The previous prime is 650802077. The next prime is 650802221. The reversal of 650802121 is 121208056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 650802121 - 2¹³ = 650793929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650802221) 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, 58075 + ... + 68368.

It is an arithmetic number, because the mean of its divisors is an integer number (162733428).

Almost surely, 2^650802121 is an apocalyptic number.

It is an amenable number.

650802121 is a deficient number, since it is larger than the sum of its proper divisors (131591).

650802121 is a wasteful number, since it uses less digits than its factorization.

650802121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131590.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 650802121 is about 25510.8236048937. The cubic root of 650802121 is about 866.5952812176.

The spelling of 650802121 in words is "six hundred fifty million, eight hundred two thousand, one hundred twenty-one".