403013813 has 2 divisors, whose sum is σ = 403013814. Its totient is φ = 403013812.

The previous prime is 403013803. The next prime is 403013827. The reversal of 403013813 is 318310304.

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., 370100644 + 32913169 = 19238^2 + 5737^2 .

It is a cyclic number.

It is not a de Polignac number, because 403013813 - 2¹⁰ = 403012789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403013803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201506906 + 201506907.

It is an arithmetic number, because the mean of its divisors is an integer number (201506907).

Almost surely, 2^403013813 is an apocalyptic number.

It is an amenable number.

403013813 is a deficient number, since it is larger than the sum of its proper divisors (1).

403013813 is an equidigital number, since it uses as much as digits as its factorization.

403013813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 403013813 is about 20075.2039342070. The cubic root of 403013813 is about 738.6521685454.

The spelling of 403013813 in words is "four hundred three million, thirteen thousand, eight hundred thirteen".