625873549 has 4 divisors (see below), whose sum is σ = 715284064. Its totient is φ = 536463036.

The previous prime is 625873541. The next prime is 625873561. The reversal of 625873549 is 945378526.

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: 945378526 = 2 ⋅472689263.

It is a cyclic number.

It is not a de Polignac number, because 625873549 - 2³ = 625873541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625873541) 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, 44705247 + ... + 44705260.

It is an arithmetic number, because the mean of its divisors is an integer number (178821016).

Almost surely, 2^625873549 is an apocalyptic number.

It is an amenable number.

625873549 is a deficient number, since it is larger than the sum of its proper divisors (89410515).

625873549 is an equidigital number, since it uses as much as digits as its factorization.

625873549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89410514.

The product of its digits is 1814400, while the sum is 49.

The square root of 625873549 is about 25017.4648795596. The cubic root of 625873549 is about 855.3861206428.

The spelling of 625873549 in words is "six hundred twenty-five million, eight hundred seventy-three thousand, five hundred forty-nine".