1547428667 has 4 divisors (see below), whose sum is σ = 1561122840. Its totient is φ = 1533734496.

The previous prime is 1547428633. The next prime is 1547428679. The reversal of 1547428667 is 7668247451.

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 1547428667 - 2⁸ = 1547428411 is a prime.

It is a super-4 number, since 4×1547428667⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1547428607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6846917 + ... + 6847142.

It is an arithmetic number, because the mean of its divisors is an integer number (390280710).

Almost surely, 2^1547428667 is an apocalyptic number.

1547428667 is a deficient number, since it is larger than the sum of its proper divisors (13694173).

1547428667 is a wasteful number, since it uses less digits than its factorization.

1547428667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13694172.

The product of its digits is 2257920, while the sum is 50.

The square root of 1547428667 is about 39337.3698536138. The cubic root of 1547428667 is about 1156.6542183030.

The spelling of 1547428667 in words is "one billion, five hundred forty-seven million, four hundred twenty-eight thousand, six hundred sixty-seven".