1004311961 has 2 divisors, whose sum is σ = 1004311962. Its totient is φ = 1004311960.

The previous prime is 1004311927. The next prime is 1004312003. The reversal of 1004311961 is 1691134001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 975625225 + 28686736 = 31235^2 + 5356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1004311961 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1004311961.

It is not a weakly prime, because it can be changed into another prime (1004311901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502155980 + 502155981.

It is an arithmetic number, because the mean of its divisors is an integer number (502155981).

Almost surely, 2^1004311961 is an apocalyptic number.

It is an amenable number.

1004311961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004311961 is an equidigital number, since it uses as much as digits as its factorization.

1004311961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1004311961 is about 31690.8813541056. The cubic root of 1004311961 is about 1001.4352593783.

Adding to 1004311961 its reverse (1691134001), we get a palindrome (2695445962).

The spelling of 1004311961 in words is "one billion, four million, three hundred eleven thousand, nine hundred sixty-one".