11403961 has 2 divisors, whose sum is σ = 11403962. Its totient is φ = 11403960.

The previous prime is 11403941. The next prime is 11403967. The reversal of 11403961 is 16930411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 414736 = 3315^2 + 644^2 .

It is a cyclic number.

It is not a de Polignac number, because 11403961 - 2⁹ = 11403449 is a prime.

It is equal to p₇₅₁₃₈₁ and since 11403961 and 751381 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11403967) 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, 5701980 + 5701981.

It is an arithmetic number, because the mean of its divisors is an integer number (5701981).

Almost surely, 2^11403961 is an apocalyptic number.

It is an amenable number.

11403961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11403961 is an equidigital number, since it uses as much as digits as its factorization.

11403961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 11403961 is about 3376.9751257597. The cubic root of 11403961 is about 225.0877748072.

The spelling of 11403961 in words is "eleven million, four hundred three thousand, nine hundred sixty-one".