1011409961 has 2 divisors, whose sum is σ = 1011409962. Its totient is φ = 1011409960.

The previous prime is 1011409943. The next prime is 1011410011. The reversal of 1011409961 is 1699041101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 873793600 + 137616361 = 29560^2 + 11731^2 .

It is an emirp because it is prime and its reverse (1699041101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011409961 - 2¹⁴ = 1011393577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011409901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505704980 + 505704981.

It is an arithmetic number, because the mean of its divisors is an integer number (505704981).

Almost surely, 2^1011409961 is an apocalyptic number.

It is an amenable number.

1011409961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011409961 is an equidigital number, since it uses as much as digits as its factorization.

1011409961 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 32.

The square root of 1011409961 is about 31802.6722304903. The cubic root of 1011409961 is about 1003.7889460894.

The spelling of 1011409961 in words is "one billion, eleven million, four hundred nine thousand, nine hundred sixty-one".