537406909 has 8 divisors (see below), whose sum is σ = 589666392. Its totient is φ = 486707520.

The previous prime is 537406879. The next prime is 537406913. The reversal of 537406909 is 909604735.

It can be written as a sum of positive squares in 4 ways, for example, as 558009 + 536848900 = 747^2 + 23170^2 .

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

It is not a de Polignac number, because 537406909 - 2¹⁵ = 537374141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537406949) 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, 389302 + ... + 390679.

It is an arithmetic number, because the mean of its divisors is an integer number (73708299).

Almost surely, 2^537406909 is an apocalyptic number.

It is an amenable number.

537406909 is a deficient number, since it is larger than the sum of its proper divisors (52259483).

537406909 is a wasteful number, since it uses less digits than its factorization.

537406909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780047.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 537406909 is about 23182.0384996661. The cubic root of 537406909 is about 813.0197240976.

The spelling of 537406909 in words is "five hundred thirty-seven million, four hundred six thousand, nine hundred nine".