1023949 has 2 divisors, whose sum is σ = 1023950. Its totient is φ = 1023948.

The previous prime is 1023947. The next prime is 1023973. The reversal of 1023949 is 9493201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1010025 + 13924 = 1005^2 + 118^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023949 - 2¹ = 1023947 is a prime.

Together with 1023947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511974 + 511975.

It is an arithmetic number, because the mean of its divisors is an integer number (511975).

2^1023949 is an apocalyptic number.

It is an amenable number.

1023949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023949 is an equidigital number, since it uses as much as digits as its factorization.

1023949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1023949 is about 1011.9036515400. The cubic root of 1023949 is about 100.7920106312.

The spelling of 1023949 in words is "one million, twenty-three thousand, nine hundred forty-nine".