538135961 has 16 divisors (see below), whose sum is σ = 599479488. Its totient is φ = 478939200.

The previous prime is 538135937. The next prime is 538135967. The reversal of 538135961 is 169531835.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538135961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538135967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150551 + ... + 154083.

It is an arithmetic number, because the mean of its divisors is an integer number (37467468).

Almost surely, 2^538135961 is an apocalyptic number.

It is an amenable number.

538135961 is a deficient number, since it is larger than the sum of its proper divisors (61343527).

538135961 is a wasteful number, since it uses less digits than its factorization.

538135961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832.

The product of its digits is 97200, while the sum is 41.

The square root of 538135961 is about 23197.7576718096. The cubic root of 538135961 is about 813.3872084076.

The spelling of 538135961 in words is "five hundred thirty-eight million, one hundred thirty-five thousand, nine hundred sixty-one".