538121007 has 24 divisors (see below), whose sum is σ = 800766096. Its totient is φ = 347970816.

The previous prime is 538120993. The next prime is 538121011. The reversal of 538121007 is 700121835.

538121007 is a `hidden beast` number, since 538 + 121 + 0 + 0 + 7 = 666.

It is not a de Polignac number, because 538121007 - 2⁴ = 538120991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538121027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113223 + ... + 117879.

It is an arithmetic number, because the mean of its divisors is an integer number (33365254).

Almost surely, 2^538121007 is an apocalyptic number.

538121007 is a deficient number, since it is larger than the sum of its proper divisors (262645089).

538121007 is a wasteful number, since it uses less digits than its factorization.

538121007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047 (or 5044 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 538121007 is about 23197.4353539351. The cubic root of 538121007 is about 813.3796740632.

The spelling of 538121007 in words is "five hundred thirty-eight million, one hundred twenty-one thousand, seven".