993420541 has 2 divisors, whose sum is σ = 993420542. Its totient is φ = 993420540.

The previous prime is 993420539. The next prime is 993420559. The reversal of 993420541 is 145024399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 939177316 + 54243225 = 30646^2 + 7365^2 .

It is a cyclic number.

It is not a de Polignac number, because 993420541 - 2¹ = 993420539 is a prime.

Together with 993420539, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 993420541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993420521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496710270 + 496710271.

It is an arithmetic number, because the mean of its divisors is an integer number (496710271).

Almost surely, 2^993420541 is an apocalyptic number.

It is an amenable number.

993420541 is a deficient number, since it is larger than the sum of its proper divisors (1).

993420541 is an equidigital number, since it uses as much as digits as its factorization.

993420541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 993420541 is about 31518.5745394680. The cubic root of 993420541 is about 997.8020194209.

The spelling of 993420541 in words is "nine hundred ninety-three million, four hundred twenty thousand, five hundred forty-one".