731934649 has 2 divisors, whose sum is σ = 731934650. Its totient is φ = 731934648.

The previous prime is 731934641. The next prime is 731934667. The reversal of 731934649 is 946439137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451137600 + 280797049 = 21240^2 + 16757^2 .

It is a cyclic number.

It is not a de Polignac number, because 731934649 - 2³ = 731934641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 731934599 and 731934608.

It is not a weakly prime, because it can be changed into another prime (731934641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365967324 + 365967325.

It is an arithmetic number, because the mean of its divisors is an integer number (365967325).

Almost surely, 2^731934649 is an apocalyptic number.

It is an amenable number.

731934649 is a deficient number, since it is larger than the sum of its proper divisors (1).

731934649 is an equidigital number, since it uses as much as digits as its factorization.

731934649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 46.

The square root of 731934649 is about 27054.2907687487. The cubic root of 731934649 is about 901.2060575694.

The spelling of 731934649 in words is "seven hundred thirty-one million, nine hundred thirty-four thousand, six hundred forty-nine".