541638997 has 2 divisors, whose sum is σ = 541638998. Its totient is φ = 541638996.

The previous prime is 541638973. The next prime is 541639039. The reversal of 541638997 is 799836145.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 478690641 + 62948356 = 21879^2 + 7934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-541638997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541632997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270819498 + 270819499.

It is an arithmetic number, because the mean of its divisors is an integer number (270819499).

Almost surely, 2^541638997 is an apocalyptic number.

It is an amenable number.

541638997 is a deficient number, since it is larger than the sum of its proper divisors (1).

541638997 is an equidigital number, since it uses as much as digits as its factorization.

541638997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 541638997 is about 23273.1389588942. The cubic root of 541638997 is about 815.1483273511.

The spelling of 541638997 in words is "five hundred forty-one million, six hundred thirty-eight thousand, nine hundred ninety-seven".