1625420239 has 2 divisors, whose sum is σ = 1625420240. Its totient is φ = 1625420238.

The previous prime is 1625420191. The next prime is 1625420257. The reversal of 1625420239 is 9320245261.

It is a strong prime.

It is an emirp because it is prime and its reverse (9320245261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1625420239 - 2²³ = 1617031631 is a prime.

It is a super-3 number, since 3×1625420239³ (a number of 29 digits) contains 333 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625420299) 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 as a sum of consecutive naturals, namely, 812710119 + 812710120.

It is an arithmetic number, because the mean of its divisors is an integer number (812710120).

Almost surely, 2^1625420239 is an apocalyptic number.

1625420239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625420239 is an equidigital number, since it uses as much as digits as its factorization.

1625420239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1625420239 is about 40316.5008278248. The cubic root of 1625420239 is about 1175.7686810266.

The spelling of 1625420239 in words is "one billion, six hundred twenty-five million, four hundred twenty thousand, two hundred thirty-nine".