649090097 has 2 divisors, whose sum is σ = 649090098. Its totient is φ = 649090096.

The previous prime is 649090067. The next prime is 649090109. The reversal of 649090097 is 790090946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 629809216 + 19280881 = 25096^2 + 4391^2 .

It is a cyclic number.

It is not a de Polignac number, because 649090097 - 2⁶ = 649090033 is a prime.

It is not a weakly prime, because it can be changed into another prime (649090067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324545048 + 324545049.

It is an arithmetic number, because the mean of its divisors is an integer number (324545049).

Almost surely, 2^649090097 is an apocalyptic number.

It is an amenable number.

649090097 is a deficient number, since it is larger than the sum of its proper divisors (1).

649090097 is an equidigital number, since it uses as much as digits as its factorization.

649090097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 649090097 is about 25477.2466526507. The cubic root of 649090097 is about 865.8347147607.

The spelling of 649090097 in words is "six hundred forty-nine million, ninety thousand, ninety-seven".