993411431 has 2 divisors, whose sum is σ = 993411432. Its totient is φ = 993411430.

The previous prime is 993411407. The next prime is 993411449. The reversal of 993411431 is 134114399.

It is a strong prime.

It is an emirp because it is prime and its reverse (134114399) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993411431 is a prime.

It is a super-2 number, since 2×993411431² = 1973732542482935522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 993411391 and 993411400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993411401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496705715 + 496705716.

It is an arithmetic number, because the mean of its divisors is an integer number (496705716).

Almost surely, 2^993411431 is an apocalyptic number.

993411431 is a deficient number, since it is larger than the sum of its proper divisors (1).

993411431 is an equidigital number, since it uses as much as digits as its factorization.

993411431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 993411431 is about 31518.4300211797. The cubic root of 993411431 is about 997.7989693517.

The spelling of 993411431 in words is "nine hundred ninety-three million, four hundred eleven thousand, four hundred thirty-one".