537681407 has 8 divisors (see below), whose sum is σ = 542142720. Its totient is φ = 533239000.

The previous prime is 537681371. The next prime is 537681409. The reversal of 537681407 is 704186735.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 537681407 - 2¹⁰ = 537680383 is a prime.

It is a super-3 number, since 3×537681407³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537681409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55508 + ... + 64470.

It is an arithmetic number, because the mean of its divisors is an integer number (67767840).

Almost surely, 2^537681407 is an apocalyptic number.

537681407 is a deficient number, since it is larger than the sum of its proper divisors (4461313).

537681407 is a wasteful number, since it uses less digits than its factorization.

537681407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9453.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 537681407 is about 23187.9582326690. The cubic root of 537681407 is about 813.1581259291.

The spelling of 537681407 in words is "five hundred thirty-seven million, six hundred eighty-one thousand, four hundred seven".