1628913047 has 4 divisors (see below), whose sum is σ = 1629199080. Its totient is φ = 1628627016.

The previous prime is 1628913043. The next prime is 1628913101. The reversal of 1628913047 is 7403198261.

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 1628913047 - 2² = 1628913043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1628912995 and 1628913013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628913043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134297 + ... + 145922.

It is an arithmetic number, because the mean of its divisors is an integer number (407299770).

Almost surely, 2^1628913047 is an apocalyptic number.

1628913047 is a deficient number, since it is larger than the sum of its proper divisors (286033).

1628913047 is an equidigital number, since it uses as much as digits as its factorization.

1628913047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286032.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1628913047 is about 40359.7949325811. The cubic root of 1628913047 is about 1176.6102677249.

The spelling of 1628913047 in words is "one billion, six hundred twenty-eight million, nine hundred thirteen thousand, forty-seven".