6503381 has 2 divisors, whose sum is σ = 6503382. Its totient is φ = 6503380.

The previous prime is 6503369. The next prime is 6503389. The reversal of 6503381 is 1833056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4268356 + 2235025 = 2066^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 6503381 - 2²² = 2309077 is a prime.

It is a super-2 number, since 2×6503381² = 84587928862322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6503381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6503389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3251690 + 3251691.

It is an arithmetic number, because the mean of its divisors is an integer number (3251691).

Almost surely, 2^6503381 is an apocalyptic number.

It is an amenable number.

6503381 is a deficient number, since it is larger than the sum of its proper divisors (1).

6503381 is an equidigital number, since it uses as much as digits as its factorization.

6503381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 6503381 is about 2550.1727392473. The cubic root of 6503381 is about 186.6579102327.

The spelling of 6503381 in words is "six million, five hundred three thousand, three hundred eighty-one".