951649 has 2 divisors, whose sum is σ = 951650. Its totient is φ = 951648.

The previous prime is 951647. The next prime is 951659. The reversal of 951649 is 946159.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 1024 = 975^2 + 32^2 .

It is a cyclic number.

It is not a de Polignac number, because 951649 - 2¹ = 951647 is a prime.

Together with 951647, it forms a pair of twin primes.

951649 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (951641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475824 + 475825.

It is an arithmetic number, because the mean of its divisors is an integer number (475825).

2⁹⁵¹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

951649 is a deficient number, since it is larger than the sum of its proper divisors (1).

951649 is an equidigital number, since it uses as much as digits as its factorization.

951649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 951649 is about 975.5249868660. The cubic root of 951649 is about 98.3616031586.

It can be divided in two parts, 951 and 649, that added together give a square (1600 = 40²).

The spelling of 951649 in words is "nine hundred fifty-one thousand, six hundred forty-nine".