650989049 has 2 divisors, whose sum is σ = 650989050. Its totient is φ = 650989048.

The previous prime is 650989037. The next prime is 650989081. The reversal of 650989049 is 940989056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398401600 + 252587449 = 19960^2 + 15893^2 .

It is a cyclic number.

It is not a de Polignac number, because 650989049 - 2²⁸ = 382553593 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 650988988 and 650989006.

It is not a weakly prime, because it can be changed into another prime (650989099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325494524 + 325494525.

It is an arithmetic number, because the mean of its divisors is an integer number (325494525).

Almost surely, 2^650989049 is an apocalyptic number.

It is an amenable number.

650989049 is a deficient number, since it is larger than the sum of its proper divisors (1).

650989049 is an equidigital number, since it uses as much as digits as its factorization.

650989049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 650989049 is about 25514.4870416789. The cubic root of 650989049 is about 866.6782431557.

It can be divided in two parts, 65098 and 9049, that added together give a palindrome (74147).

The spelling of 650989049 in words is "six hundred fifty million, nine hundred eighty-nine thousand, forty-nine".