9993551 has 2 divisors, whose sum is σ = 9993552. Its totient is φ = 9993550.

The previous prime is 9993541. The next prime is 9993611. The reversal of 9993551 is 1553999.

9993551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9993551 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9993499 and 9993508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9993541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996775 + 4996776.

It is an arithmetic number, because the mean of its divisors is an integer number (4996776).

Almost surely, 2^9993551 is an apocalyptic number.

9993551 is a deficient number, since it is larger than the sum of its proper divisors (1).

9993551 is an equidigital number, since it uses as much as digits as its factorization.

9993551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54675, while the sum is 41.

The square root of 9993551 is about 3161.2578192865. The cubic root of 9993551 is about 215.3971458794.

The spelling of 9993551 in words is "nine million, nine hundred ninety-three thousand, five hundred fifty-one".