540247691 has 12 divisors (see below), whose sum is σ = 571728600. Its totient is φ = 510422688.

The previous prime is 540247681. The next prime is 540247717. The reversal of 540247691 is 196742045.

It is a de Polignac number, because none of the positive numbers 2^k-540247691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540247661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145820 + ... + 149478.

It is an arithmetic number, because the mean of its divisors is an integer number (47644050).

Almost surely, 2^540247691 is an apocalyptic number.

540247691 is a deficient number, since it is larger than the sum of its proper divisors (31480909).

540247691 is a wasteful number, since it uses less digits than its factorization.

540247691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106 (or 4087 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 540247691 is about 23243.2289280126. The cubic root of 540247691 is about 814.4497727642.

The spelling of 540247691 in words is "five hundred forty million, two hundred forty-seven thousand, six hundred ninety-one".