402244013 has 2 divisors, whose sum is σ = 402244014. Its totient is φ = 402244012.

The previous prime is 402244009. The next prime is 402244019. The reversal of 402244013 is 310442204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397324489 + 4919524 = 19933^2 + 2218^2 .

It is a cyclic number.

It is not a de Polignac number, because 402244013 - 2² = 402244009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402244019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201122006 + 201122007.

It is an arithmetic number, because the mean of its divisors is an integer number (201122007).

Almost surely, 2^402244013 is an apocalyptic number.

It is an amenable number.

402244013 is a deficient number, since it is larger than the sum of its proper divisors (1).

402244013 is an equidigital number, since it uses as much as digits as its factorization.

402244013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402244013 is about 20056.0218637695. The cubic root of 402244013 is about 738.1815669233.

Adding to 402244013 its reverse (310442204), we get a palindrome (712686217).

The spelling of 402244013 in words is "four hundred two million, two hundred forty-four thousand, thirteen".