625639449 has 8 divisors (see below), whose sum is σ = 839008512. Its totient is φ = 414681680.

The previous prime is 625639411. The next prime is 625639463. The reversal of 625639449 is 944936526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625639449 - 2⁸ = 625639193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 625639398 and 625639407.

It is not an unprimeable number, because it can be changed into a prime (625639499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602217 + ... + 603254.

It is an arithmetic number, because the mean of its divisors is an integer number (104876064).

Almost surely, 2^625639449 is an apocalyptic number.

It is an amenable number.

625639449 is a deficient number, since it is larger than the sum of its proper divisors (213369063).

625639449 is a wasteful number, since it uses less digits than its factorization.

625639449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205647.

The product of its digits is 1399680, while the sum is 48.

The square root of 625639449 is about 25012.7857105121. The cubic root of 625639449 is about 855.2794585954.

The spelling of 625639449 in words is "six hundred twenty-five million, six hundred thirty-nine thousand, four hundred forty-nine".