649167131 has 2 divisors, whose sum is σ = 649167132. Its totient is φ = 649167130.

The previous prime is 649167119. The next prime is 649167137. The reversal of 649167131 is 131761946.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649167131 is a prime.

It is a super-2 number, since 2×649167131² = 842835927941542322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (649167137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324583565 + 324583566.

It is an arithmetic number, because the mean of its divisors is an integer number (324583566).

Almost surely, 2^649167131 is an apocalyptic number.

649167131 is a deficient number, since it is larger than the sum of its proper divisors (1).

649167131 is an equidigital number, since it uses as much as digits as its factorization.

649167131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 649167131 is about 25478.7584273645. The cubic root of 649167131 is about 865.8689658214.

The spelling of 649167131 in words is "six hundred forty-nine million, one hundred sixty-seven thousand, one hundred thirty-one".