650687629 has 2 divisors, whose sum is σ = 650687630. Its totient is φ = 650687628.

The previous prime is 650687621. The next prime is 650687647. The reversal of 650687629 is 926786056.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474063529 + 176624100 = 21773^2 + 13290^2 .

It is a cyclic number.

It is not a de Polignac number, because 650687629 - 2³ = 650687621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650687621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325343814 + 325343815.

It is an arithmetic number, because the mean of its divisors is an integer number (325343815).

Almost surely, 2^650687629 is an apocalyptic number.

It is an amenable number.

650687629 is a deficient number, since it is larger than the sum of its proper divisors (1).

650687629 is an equidigital number, since it uses as much as digits as its factorization.

650687629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 650687629 is about 25508.5795174878. The cubic root of 650687629 is about 866.5444598068.

The spelling of 650687629 in words is "six hundred fifty million, six hundred eighty-seven thousand, six hundred twenty-nine".