650078069 has 4 divisors (see below), whose sum is σ = 650135340. Its totient is φ = 650020800.

The previous prime is 650078057. The next prime is 650078087. The reversal of 650078069 is 960870056.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 375778225 + 274299844 = 19385^2 + 16562^2 .

It is a cyclic number.

It is not a de Polignac number, because 650078069 - 2⁴ = 650078053 is a prime.

It is a super-2 number, since 2×650078069² = 845202991589537522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650078269) 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, 5234 + ... + 36435.

It is an arithmetic number, because the mean of its divisors is an integer number (162533835).

Almost surely, 2^650078069 is an apocalyptic number.

It is an amenable number.

650078069 is a deficient number, since it is larger than the sum of its proper divisors (57271).

650078069 is a wasteful number, since it uses less digits than its factorization.

650078069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57270.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 650078069 is about 25496.6285810497. The cubic root of 650078069 is about 866.2737841683.

The spelling of 650078069 in words is "six hundred fifty million, seventy-eight thousand, sixty-nine".