403424381 has 2 divisors, whose sum is σ = 403424382. Its totient is φ = 403424380.

The previous prime is 403424377. The next prime is 403424387. The reversal of 403424381 is 183424304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402363481 + 1060900 = 20059^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 403424381 - 2² = 403424377 is a prime.

It is a super-2 number, since 2×403424381² = 325502462370466322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403424387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201712190 + 201712191.

It is an arithmetic number, because the mean of its divisors is an integer number (201712191).

Almost surely, 2^403424381 is an apocalyptic number.

It is an amenable number.

403424381 is a deficient number, since it is larger than the sum of its proper divisors (1).

403424381 is an equidigital number, since it uses as much as digits as its factorization.

403424381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 403424381 is about 20085.4270803486. The cubic root of 403424381 is about 738.9029159625.

Adding to 403424381 its reverse (183424304), we get a palindrome (586848685).

The spelling of 403424381 in words is "four hundred three million, four hundred twenty-four thousand, three hundred eighty-one".