649101833 has 2 divisors, whose sum is σ = 649101834. Its totient is φ = 649101832.

The previous prime is 649101821. The next prime is 649101857. The reversal of 649101833 is 338101946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 542330944 + 106770889 = 23288^2 + 10333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649101833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649101793 and 649101802.

It is not a weakly prime, because it can be changed into another prime (649101863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324550916 + 324550917.

It is an arithmetic number, because the mean of its divisors is an integer number (324550917).

Almost surely, 2^649101833 is an apocalyptic number.

It is an amenable number.

649101833 is a deficient number, since it is larger than the sum of its proper divisors (1).

649101833 is an equidigital number, since it uses as much as digits as its factorization.

649101833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 649101833 is about 25477.4769747713. The cubic root of 649101833 is about 865.8399330270.

The spelling of 649101833 in words is "six hundred forty-nine million, one hundred one thousand, eight hundred thirty-three".