650740591 has 2 divisors, whose sum is σ = 650740592. Its totient is φ = 650740590.

The previous prime is 650740583. The next prime is 650740613. The reversal of 650740591 is 195047056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 650740591 - 2³ = 650740583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 650740591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650740511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325370295 + 325370296.

It is an arithmetic number, because the mean of its divisors is an integer number (325370296).

Almost surely, 2^650740591 is an apocalyptic number.

650740591 is a deficient number, since it is larger than the sum of its proper divisors (1).

650740591 is an equidigital number, since it uses as much as digits as its factorization.

650740591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 650740591 is about 25509.6176176751. The cubic root of 650740591 is about 866.5679696450.

The spelling of 650740591 in words is "six hundred fifty million, seven hundred forty thousand, five hundred ninety-one".