1543428407 has 4 divisors (see below), whose sum is σ = 1551509376. Its totient is φ = 1535347440.

The previous prime is 1543428389. The next prime is 1543428427. The reversal of 1543428407 is 7048243451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7048243451 = 2213 ⋅3184927.

It is a cyclic number.

It is not a de Polignac number, because 1543428407 - 2⁸ = 1543428151 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 (1543428427) 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, 4040198 + ... + 4040579.

It is an arithmetic number, because the mean of its divisors is an integer number (387877344).

Almost surely, 2^1543428407 is an apocalyptic number.

1543428407 is a deficient number, since it is larger than the sum of its proper divisors (8080969).

1543428407 is an equidigital number, since it uses as much as digits as its factorization.

1543428407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8080968.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 1543428407 is about 39286.4914060800. The cubic root of 1543428407 is about 1155.6566687433.

The spelling of 1543428407 in words is "one billion, five hundred forty-three million, four hundred twenty-eight thousand, four hundred seven".