540749369 has 4 divisors (see below), whose sum is σ = 553938420. Its totient is φ = 527560320.

The previous prime is 540749359. The next prime is 540749383. The reversal of 540749369 is 963947045.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171610000 + 369139369 = 13100^2 + 19213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540749369 is a prime.

It is a super-2 number, since 2×540749369² = 584819760147796322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540749309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6594464 + ... + 6594545.

It is an arithmetic number, because the mean of its divisors is an integer number (138484605).

Almost surely, 2^540749369 is an apocalyptic number.

It is an amenable number.

540749369 is a deficient number, since it is larger than the sum of its proper divisors (13189051).

540749369 is a wasteful number, since it uses less digits than its factorization.

540749369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13189050.

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 540749369 is about 23254.0183409234. The cubic root of 540749369 is about 814.7017961301.

The spelling of 540749369 in words is "five hundred forty million, seven hundred forty-nine thousand, three hundred sixty-nine".