540487191 has 16 divisors (see below), whose sum is σ = 734321664. Its totient is φ = 353531904.

The previous prime is 540487187. The next prime is 540487271. The reversal of 540487191 is 191784045.

It is not a de Polignac number, because 540487191 - 2² = 540487187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540487691) 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, 46426 + ... + 56888.

It is an arithmetic number, because the mean of its divisors is an integer number (45895104).

Almost surely, 2^540487191 is an apocalyptic number.

540487191 is a deficient number, since it is larger than the sum of its proper divisors (193834473).

540487191 is a wasteful number, since it uses less digits than its factorization.

540487191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10790.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 540487191 is about 23248.3803952017. The cubic root of 540487191 is about 814.5701076318.

The spelling of 540487191 in words is "five hundred forty million, four hundred eighty-seven thousand, one hundred ninety-one".