401433961 has 2 divisors, whose sum is σ = 401433962. Its totient is φ = 401433960.

The previous prime is 401433947. The next prime is 401434009. The reversal of 401433961 is 169334104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250905600 + 150528361 = 15840^2 + 12269^2 .

It is a cyclic number.

It is not a de Polignac number, because 401433961 - 2⁷ = 401433833 is a prime.

It is a super-2 number, since 2×401433961² = 322298450088299042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401433931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200716980 + 200716981.

It is an arithmetic number, because the mean of its divisors is an integer number (200716981).

Almost surely, 2^401433961 is an apocalyptic number.

It is an amenable number.

401433961 is a deficient number, since it is larger than the sum of its proper divisors (1).

401433961 is an equidigital number, since it uses as much as digits as its factorization.

401433961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 401433961 is about 20035.8169536458. The cubic root of 401433961 is about 737.6857092799.

The spelling of 401433961 in words is "four hundred one million, four hundred thirty-three thousand, nine hundred sixty-one".