650511091 has 2 divisors, whose sum is σ = 650511092. Its totient is φ = 650511090.

The previous prime is 650511083. The next prime is 650511149. The reversal of 650511091 is 190115056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 650511091 - 2³ = 650511083 is a prime.

It is not a weakly prime, because it can be changed into another prime (650511041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325255545 + 325255546.

It is an arithmetic number, because the mean of its divisors is an integer number (325255546).

Almost surely, 2^650511091 is an apocalyptic number.

650511091 is a deficient number, since it is larger than the sum of its proper divisors (1).

650511091 is an equidigital number, since it uses as much as digits as its factorization.

650511091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 650511091 is about 25505.1189175820. The cubic root of 650511091 is about 866.4660853529.

The spelling of 650511091 in words is "six hundred fifty million, five hundred eleven thousand, ninety-one".