402361657 has 2 divisors, whose sum is σ = 402361658. Its totient is φ = 402361656.

The previous prime is 402361649. The next prime is 402361667. The reversal of 402361657 is 756163204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 386869561 + 15492096 = 19669^2 + 3936^2 .

It is a cyclic number.

It is not a de Polignac number, because 402361657 - 2³ = 402361649 is a prime.

It is a super-3 number, since 3×402361657³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (402361667) 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, 201180828 + 201180829.

It is an arithmetic number, because the mean of its divisors is an integer number (201180829).

Almost surely, 2^402361657 is an apocalyptic number.

It is an amenable number.

402361657 is a deficient number, since it is larger than the sum of its proper divisors (1).

402361657 is an equidigital number, since it uses as much as digits as its factorization.

402361657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 402361657 is about 20058.9545340728. The cubic root of 402361657 is about 738.2535250420.

The spelling of 402361657 in words is "four hundred two million, three hundred sixty-one thousand, six hundred fifty-seven".