402363961 has 2 divisors, whose sum is σ = 402363962. Its totient is φ = 402363960.

The previous prime is 402363917. The next prime is 402363967. The reversal of 402363961 is 169363204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386515600 + 15848361 = 19660^2 + 3981^2 .

It is a cyclic number.

It is not a de Polignac number, because 402363961 - 2¹¹ = 402361913 is a prime.

It is a super-2 number, since 2×402363961² = 323793514223219042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402363967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201181980 + 201181981.

It is an arithmetic number, because the mean of its divisors is an integer number (201181981).

Almost surely, 2^402363961 is an apocalyptic number.

It is an amenable number.

402363961 is a deficient number, since it is larger than the sum of its proper divisors (1).

402363961 is an equidigital number, since it uses as much as digits as its factorization.

402363961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 402363961 is about 20059.0119647006. The cubic root of 402363961 is about 738.2549341664.

The spelling of 402363961 in words is "four hundred two million, three hundred sixty-three thousand, nine hundred sixty-one".