939649 has 2 divisors, whose sum is σ = 939650. Its totient is φ = 939648.

The previous prime is 939623. The next prime is 939661. The reversal of 939649 is 946939.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540225 + 399424 = 735^2 + 632^2 .

It is a cyclic number.

It is not a de Polignac number, because 939649 - 2¹⁵ = 906881 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (939349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469824 + 469825.

It is an arithmetic number, because the mean of its divisors is an integer number (469825).

2⁹³⁹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

939649 is a deficient number, since it is larger than the sum of its proper divisors (1).

939649 is an equidigital number, since it uses as much as digits as its factorization.

939649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 40.

The square root of 939649 is about 969.3549401535. The cubic root of 939649 is about 97.9464166329.

The spelling of 939649 in words is "nine hundred thirty-nine thousand, six hundred forty-nine".