538672961 has 2 divisors, whose sum is σ = 538672962. Its totient is φ = 538672960.

The previous prime is 538672943. The next prime is 538672963. The reversal of 538672961 is 169276835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 535228225 + 3444736 = 23135^2 + 1856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538672961 is a prime.

Together with 538672963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (538672963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269336480 + 269336481.

It is an arithmetic number, because the mean of its divisors is an integer number (269336481).

Almost surely, 2^538672961 is an apocalyptic number.

It is an amenable number.

538672961 is a deficient number, since it is larger than the sum of its proper divisors (1).

538672961 is an equidigital number, since it uses as much as digits as its factorization.

538672961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 538672961 is about 23209.3291803102. The cubic root of 538672961 is about 813.6576752004.

The spelling of 538672961 in words is "five hundred thirty-eight million, six hundred seventy-two thousand, nine hundred sixty-one".