402561593 has 4 divisors (see below), whose sum is σ = 460070400. Its totient is φ = 345052788.

The previous prime is 402561541. The next prime is 402561611. The reversal of 402561593 is 395165204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402561593 - 2⁶ = 402561529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402561193) 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 in 3 ways as a sum of consecutive naturals, for example, 28754393 + ... + 28754406.

It is an arithmetic number, because the mean of its divisors is an integer number (115017600).

Almost surely, 2^402561593 is an apocalyptic number.

It is an amenable number.

402561593 is a deficient number, since it is larger than the sum of its proper divisors (57508807).

402561593 is an equidigital number, since it uses as much as digits as its factorization.

402561593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57508806.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 402561593 is about 20063.9376245043. The cubic root of 402561593 is about 738.3757857103.

The spelling of 402561593 in words is "four hundred two million, five hundred sixty-one thousand, five hundred ninety-three".