6650431 has 2 divisors, whose sum is σ = 6650432. Its totient is φ = 6650430.

The previous prime is 6650393. The next prime is 6650443. The reversal of 6650431 is 1340566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6650431 - 2⁹ = 6649919 is a prime.

It is a super-2 number, since 2×6650431² = 88456464971522, which contains 22 as substring.

6650431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6650396 and 6650405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6650131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325215 + 3325216.

It is an arithmetic number, because the mean of its divisors is an integer number (3325216).

Almost surely, 2^6650431 is an apocalyptic number.

6650431 is a deficient number, since it is larger than the sum of its proper divisors (1).

6650431 is an equidigital number, since it uses as much as digits as its factorization.

6650431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 6650431 is about 2578.8429576072. The cubic root of 6650431 is about 188.0542981082.

Adding to 6650431 its reverse (1340566), we get a palindrome (7990997).

The spelling of 6650431 in words is "six million, six hundred fifty thousand, four hundred thirty-one".