650976509 has 2 divisors, whose sum is σ = 650976510. Its totient is φ = 650976508.

The previous prime is 650976481. The next prime is 650976541. The reversal of 650976509 is 905679056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 613949284 + 37027225 = 24778^2 + 6085^2 .

It is a cyclic number.

It is not a de Polignac number, because 650976509 - 2¹⁶ = 650910973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650076509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325488254 + 325488255.

It is an arithmetic number, because the mean of its divisors is an integer number (325488255).

Almost surely, 2^650976509 is an apocalyptic number.

It is an amenable number.

650976509 is a deficient number, since it is larger than the sum of its proper divisors (1).

650976509 is an equidigital number, since it uses as much as digits as its factorization.

650976509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 510300, while the sum is 47.

The square root of 650976509 is about 25514.2412977537. The cubic root of 650976509 is about 866.6726781799.

The spelling of 650976509 in words is "six hundred fifty million, nine hundred seventy-six thousand, five hundred nine".