1950409 has 2 divisors, whose sum is σ = 1950410. Its totient is φ = 1950408.

The previous prime is 1950401. The next prime is 1950419. The reversal of 1950409 is 9040591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 558009 = 1180^2 + 747^2 .

It is a cyclic number.

It is not a de Polignac number, because 1950409 - 2³ = 1950401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1950401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975204 + 975205.

It is an arithmetic number, because the mean of its divisors is an integer number (975205).

2^1950409 is an apocalyptic number.

It is an amenable number.

1950409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1950409 is an equidigital number, since it uses as much as digits as its factorization.

1950409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1950409 is about 1396.5704421904. The cubic root of 1950409 is about 124.9420317883.

The spelling of 1950409 in words is "one million, nine hundred fifty thousand, four hundred nine".