993979541 has 2 divisors, whose sum is σ = 993979542. Its totient is φ = 993979540.

The previous prime is 993979537. The next prime is 993979573. The reversal of 993979541 is 145979399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 891261316 + 102718225 = 29854^2 + 10135^2 .

It is a cyclic number.

It is not a de Polignac number, because 993979541 - 2² = 993979537 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993079541) 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, 496989770 + 496989771.

It is an arithmetic number, because the mean of its divisors is an integer number (496989771).

Almost surely, 2^993979541 is an apocalyptic number.

It is an amenable number.

993979541 is a deficient number, since it is larger than the sum of its proper divisors (1).

993979541 is an equidigital number, since it uses as much as digits as its factorization.

993979541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2755620, while the sum is 56.

The square root of 993979541 is about 31527.4410791615. The cubic root of 993979541 is about 997.9891394837.

The spelling of 993979541 in words is "nine hundred ninety-three million, nine hundred seventy-nine thousand, five hundred forty-one".