993617431 has 2 divisors, whose sum is σ = 993617432. Its totient is φ = 993617430.

The previous prime is 993617353. The next prime is 993617467. The reversal of 993617431 is 134716399.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 993617431 - 2¹⁵ = 993584663 is a prime.

It is a super-2 number, since 2×993617431² = 1974551198374079522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993617531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496808715 + 496808716.

It is an arithmetic number, because the mean of its divisors is an integer number (496808716).

Almost surely, 2^993617431 is an apocalyptic number.

993617431 is a deficient number, since it is larger than the sum of its proper divisors (1).

993617431 is an equidigital number, since it uses as much as digits as its factorization.

993617431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 43.

The square root of 993617431 is about 31521.6977810523. The cubic root of 993617431 is about 997.8679345274.

The spelling of 993617431 in words is "nine hundred ninety-three million, six hundred seventeen thousand, four hundred thirty-one".