509706725 has 12 divisors (see below), whose sum is σ = 689494560. Its totient is φ = 370695600.

The previous prime is 509706707. The next prime is 509706731. The reversal of 509706725 is 527607905.

It is not a de Polignac number, because 509706725 - 2⁶ = 509706661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 926465 + ... + 927014.

It is an arithmetic number, because the mean of its divisors is an integer number (57457880).

Almost surely, 2^509706725 is an apocalyptic number.

509706725 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

509706725 is a deficient number, since it is larger than the sum of its proper divisors (179787835).

509706725 is a wasteful number, since it uses less digits than its factorization.

509706725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853500 (or 1853495 counting only the distinct ones).

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 509706725 is about 22576.6854298854. The cubic root of 509706725 is about 798.8037982056.

The spelling of 509706725 in words is "five hundred nine million, seven hundred six thousand, seven hundred twenty-five".