68517925 has 18 divisors (see below), whose sum is σ = 98835378. Its totient is φ = 46982880.

The previous prime is 68517919. The next prime is 68517931. The reversal of 68517925 is 52971586.

It is an interprime number because it is at equal distance from previous prime (68517919) and next prime (68517931).

It can be written as a sum of positive squares in 3 ways, for example, as 636804 + 67881121 = 798^2 + 8239^2 .

It is not a de Polignac number, because 68517925 - 2⁵ = 68517893 is a prime.

It is a super-3 number, since 3×68517925³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26742 + ... + 29191.

Almost surely, 2^68517925 is an apocalyptic number.

It is an amenable number.

68517925 is a deficient number, since it is larger than the sum of its proper divisors (30317453).

68517925 is a wasteful number, since it uses less digits than its factorization.

68517925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55957 (or 55945 counting only the distinct ones).

The product of its digits is 151200, while the sum is 43.

The square root of 68517925 is about 8277.5554966427. Note that the first 3 decimals coincide. The cubic root of 68517925 is about 409.1991605407.

The spelling of 68517925 in words is "sixty-eight million, five hundred seventeen thousand, nine hundred twenty-five".