402226837 has 2 divisors, whose sum is σ = 402226838. Its totient is φ = 402226836.

The previous prime is 402226801. The next prime is 402226849. The reversal of 402226837 is 738622204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398361681 + 3865156 = 19959^2 + 1966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402226837 is a prime.

It is equal to p_21448627 and since 402226837 and 21448627 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402226037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201113418 + 201113419.

It is an arithmetic number, because the mean of its divisors is an integer number (201113419).

Almost surely, 2^402226837 is an apocalyptic number.

It is an amenable number.

402226837 is a deficient number, since it is larger than the sum of its proper divisors (1).

402226837 is an equidigital number, since it uses as much as digits as its factorization.

402226837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 402226837 is about 20055.5936586280. The cubic root of 402226837 is about 738.1710598789.

The spelling of 402226837 in words is "four hundred two million, two hundred twenty-six thousand, eight hundred thirty-seven".