11990401 has 2 divisors, whose sum is σ = 11990402. Its totient is φ = 11990400.

The previous prime is 11990371. The next prime is 11990431. The reversal of 11990401 is 10409911.

It is a balanced prime because it is at equal distance from previous prime (11990371) and next prime (11990431).

It can be written as a sum of positive squares in only one way, i.e., 10890000 + 1100401 = 3300^2 + 1049^2 .

It is an emirp because it is prime and its reverse (10409911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11990401 - 2¹⁵ = 11957633 is a prime.

It is a super-2 number, since 2×11990401² = 287539432281602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11990431) 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, 5995200 + 5995201.

It is an arithmetic number, because the mean of its divisors is an integer number (5995201).

Almost surely, 2^11990401 is an apocalyptic number.

It is an amenable number.

11990401 is a deficient number, since it is larger than the sum of its proper divisors (1).

11990401 is an equidigital number, since it uses as much as digits as its factorization.

11990401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 11990401 is about 3462.7158416480. The cubic root of 11990401 is about 228.8817871597.

The spelling of 11990401 in words is "eleven million, nine hundred ninety thousand, four hundred one".