1540053943 has 8 divisors (see below), whose sum is σ = 1553195520. Its totient is φ = 1526928480.

The previous prime is 1540053937. The next prime is 1540053973. The reversal of 1540053943 is 3493500451.

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 1540053943 - 2²⁹ = 1003183031 is a prime.

It is a super-2 number, since 2×1540053943² = 4743532294699694498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1540053899 and 1540053908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540053973) 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, 259833 + ... + 265693.

It is an arithmetic number, because the mean of its divisors is an integer number (194149440).

Almost surely, 2^1540053943 is an apocalyptic number.

1540053943 is a deficient number, since it is larger than the sum of its proper divisors (13141577).

1540053943 is a wasteful number, since it uses less digits than its factorization.

1540053943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8057.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 1540053943 is about 39243.5210321398. The cubic root of 1540053943 is about 1154.8138335530.

The spelling of 1540053943 in words is "one billion, five hundred forty million, fifty-three thousand, nine hundred forty-three".