1628617249 has 4 divisors (see below), whose sum is σ = 1861276864. Its totient is φ = 1395957636.

The previous prime is 1628617213. The next prime is 1628617259. The reversal of 1628617249 is 9427168261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1628617249 - 2¹⁵ = 1628584481 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1628617199 and 1628617208.

It is not an unprimeable number, because it can be changed into a prime (1628617259) 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, 116329797 + ... + 116329810.

It is an arithmetic number, because the mean of its divisors is an integer number (465319216).

Almost surely, 2^1628617249 is an apocalyptic number.

It is an amenable number.

1628617249 is a deficient number, since it is larger than the sum of its proper divisors (232659615).

1628617249 is an equidigital number, since it uses as much as digits as its factorization.

1628617249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232659614.

The product of its digits is 290304, while the sum is 46.

The square root of 1628617249 is about 40356.1302530359. The cubic root of 1628617249 is about 1176.5390423079.

The spelling of 1628617249 in words is "one billion, six hundred twenty-eight million, six hundred seventeen thousand, two hundred forty-nine".