537618921 has 16 divisors (see below), whose sum is σ = 831458304. Its totient is φ = 302624784.

The previous prime is 537618919. The next prime is 537618923. The reversal of 537618921 is 129816735.

It is an interprime number because it is at equal distance from previous prime (537618919) and next prime (537618923).

It is not a de Polignac number, because 537618921 - 2¹ = 537618919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (537618923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189645 + ... + 192458.

It is an arithmetic number, because the mean of its divisors is an integer number (51966144).

Almost surely, 2^537618921 is an apocalyptic number.

It is an amenable number.

537618921 is a deficient number, since it is larger than the sum of its proper divisors (293839383).

537618921 is a wasteful number, since it uses less digits than its factorization.

537618921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382180.

The product of its digits is 90720, while the sum is 42.

The square root of 537618921 is about 23186.6108131396. The cubic root of 537618921 is about 813.1266246433.

The spelling of 537618921 in words is "five hundred thirty-seven million, six hundred eighteen thousand, nine hundred twenty-one".