625820149 has 4 divisors (see below), whose sum is σ = 625881964. Its totient is φ = 625758336.

The previous prime is 625820137. The next prime is 625820191. The reversal of 625820149 is 941028526.

625820149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 941028526 = 2 ⋅470514263.

It can be written as a sum of positive squares in 2 ways, for example, as 440370225 + 185449924 = 20985^2 + 13618^2 .

It is a cyclic number.

It is not a de Polignac number, because 625820149 - 2⁹ = 625819637 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 (625820549) 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, 11772 + ... + 37285.

It is an arithmetic number, because the mean of its divisors is an integer number (156470491).

Almost surely, 2^625820149 is an apocalyptic number.

It is an amenable number.

625820149 is a deficient number, since it is larger than the sum of its proper divisors (61815).

625820149 is a wasteful number, since it uses less digits than its factorization.

625820149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61814.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 625820149 is about 25016.3976023727. The cubic root of 625820149 is about 855.3617925561.

The spelling of 625820149 in words is "six hundred twenty-five million, eight hundred twenty thousand, one hundred forty-nine".