1628525297 has 4 divisors (see below), whose sum is σ = 1861171776. Its totient is φ = 1395878820.

The previous prime is 1628525177. The next prime is 1628525303. The reversal of 1628525297 is 7925258261.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7925258261 = 28123 ⋅281807.

It is not a de Polignac number, because 1628525297 - 2¹⁴ = 1628508913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1628524297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116323229 + ... + 116323242.

It is an arithmetic number, because the mean of its divisors is an integer number (465292944).

Almost surely, 2^1628525297 is an apocalyptic number.

It is an amenable number.

1628525297 is a deficient number, since it is larger than the sum of its proper divisors (232646479).

1628525297 is an equidigital number, since it uses as much as digits as its factorization.

1628525297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232646478.

The product of its digits is 604800, while the sum is 47.

The square root of 1628525297 is about 40354.9909800510. The cubic root of 1628525297 is about 1176.5168993613.

The spelling of 1628525297 in words is "one billion, six hundred twenty-eight million, five hundred twenty-five thousand, two hundred ninety-seven".