499681625 has 8 divisors (see below), whose sum is σ = 623602824. Its totient is φ = 399745200.

The previous prime is 499681621. The next prime is 499681631. The reversal of 499681625 is 526186994.

It can be written as a sum of positive squares in 4 ways, for example, as 2347024 + 497334601 = 1532^2 + 22301^2 .

It is not a de Polignac number, because 499681625 - 2² = 499681621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (499681621) 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, 1998602 + ... + 1998851.

It is an arithmetic number, because the mean of its divisors is an integer number (77950353).

Almost surely, 2^499681625 is an apocalyptic number.

It is an amenable number.

499681625 is a deficient number, since it is larger than the sum of its proper divisors (123921199).

499681625 is an equidigital number, since it uses as much as digits as its factorization.

499681625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997468 (or 3997458 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 499681625 is about 22353.5595599448. The cubic root of 499681625 is about 793.5320272785.

The spelling of 499681625 in words is "four hundred ninety-nine million, six hundred eighty-one thousand, six hundred twenty-five".