1969949 has 2 divisors, whose sum is σ = 1969950. Its totient is φ = 1969948.

The previous prime is 1969921. The next prime is 1969967. The reversal of 1969949 is 9499691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1909924 + 60025 = 1382^2 + 245^2 .

It is an emirp because it is prime and its reverse (9499691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1969949 - 2¹² = 1965853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1969969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984974 + 984975.

It is an arithmetic number, because the mean of its divisors is an integer number (984975).

2^1969949 is an apocalyptic number.

It is an amenable number.

1969949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969949 is an equidigital number, since it uses as much as digits as its factorization.

1969949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 47.

The square root of 1969949 is about 1403.5487166465. The cubic root of 1969949 is about 125.3578863609.

The spelling of 1969949 in words is "one million, nine hundred sixty-nine thousand, nine hundred forty-nine".