402030523 has 2 divisors, whose sum is σ = 402030524. Its totient is φ = 402030522.

The previous prime is 402030487. The next prime is 402030529. The reversal of 402030523 is 325030204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402030523 - 2²⁵ = 368476091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402030523.

It is not a weakly prime, because it can be changed into another prime (402030529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201015261 + 201015262.

It is an arithmetic number, because the mean of its divisors is an integer number (201015262).

Almost surely, 2^402030523 is an apocalyptic number.

402030523 is a deficient number, since it is larger than the sum of its proper divisors (1).

402030523 is an equidigital number, since it uses as much as digits as its factorization.

402030523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 402030523 is about 20050.6988157520. The cubic root of 402030523 is about 738.0509478075.

Adding to 402030523 its reverse (325030204), we get a palindrome (727060727).

It can be divided in two parts, 4020 and 30523, that added together give a palindrome (34543).

The spelling of 402030523 in words is "four hundred two million, thirty thousand, five hundred twenty-three".