1543748879 has 4 divisors (see below), whose sum is σ = 1624998840. Its totient is φ = 1462498920.

The previous prime is 1543748839. The next prime is 1543748893. The reversal of 1543748879 is 9788473451.

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

It is a cyclic number.

It is not a de Polignac number, because 1543748879 - 2¹⁶ = 1543683343 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 (1543748839) 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, 40624952 + ... + 40624989.

It is an arithmetic number, because the mean of its divisors is an integer number (406249710).

Almost surely, 2^1543748879 is an apocalyptic number.

1543748879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1543748879 is a deficient number, since it is larger than the sum of its proper divisors (81249961).

1543748879 is an equidigital number, since it uses as much as digits as its factorization.

1543748879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81249960.

The product of its digits is 6773760, while the sum is 56.

The square root of 1543748879 is about 39290.5698482473. The cubic root of 1543748879 is about 1155.7366486919.

The spelling of 1543748879 in words is "one billion, five hundred forty-three million, seven hundred forty-eight thousand, eight hundred seventy-nine".