6617431 has 2 divisors, whose sum is σ = 6617432. Its totient is φ = 6617430.

The previous prime is 6617411. The next prime is 6617449. The reversal of 6617431 is 1347166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6617431 - 2¹⁵ = 6584663 is a prime.

It is a super-2 number, since 2×6617431² = 87580786079522, which contains 22 as substring.

It is an Ulam number.

6617431 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6617431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6617411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3308715 + 3308716.

It is an arithmetic number, because the mean of its divisors is an integer number (3308716).

Almost surely, 2^6617431 is an apocalyptic number.

6617431 is a deficient number, since it is larger than the sum of its proper divisors (1).

6617431 is an equidigital number, since it uses as much as digits as its factorization.

6617431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 6617431 is about 2572.4367825080. The cubic root of 6617431 is about 187.7427351041.

The spelling of 6617431 in words is "six million, six hundred seventeen thousand, four hundred thirty-one".