650594138 has 4 divisors (see below), whose sum is σ = 975891210. Its totient is φ = 325297068.

The previous prime is 650594137. The next prime is 650594141. The reversal of 650594138 is 831495056.

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

It can be written as a sum of positive squares in only one way, i.e., 622153249 + 28440889 = 24943^2 + 5333^2 .

It is a junction number, because it is equal to n+sod(n) for n = 650594095 and 650594104.

It is not an unprimeable number, because it can be changed into a prime (650594137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162648533 + ... + 162648536.

Almost surely, 2^650594138 is an apocalyptic number.

650594138 is a deficient number, since it is larger than the sum of its proper divisors (325297072).

650594138 is a wasteful number, since it uses less digits than its factorization.

650594138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325297071.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 650594138 is about 25506.7469113566. The cubic root of 650594138 is about 866.5029560269.

The spelling of 650594138 in words is "six hundred fifty million, five hundred ninety-four thousand, one hundred thirty-eight".