68143725 has 36 divisors (see below), whose sum is σ = 131447316. Its totient is φ = 33546240.

The previous prime is 68143723. The next prime is 68143781. The reversal of 68143725 is 52734186.

It can be written as a sum of positive squares in 6 ways, for example, as 19660356 + 48483369 = 4434^2 + 6963^2 .

It is not a de Polignac number, because 68143725 - 2¹ = 68143723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68143725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68143721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8724 + ... + 14573.

Almost surely, 2^68143725 is an apocalyptic number.

68143725 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68143725 is a deficient number, since it is larger than the sum of its proper divisors (63303591).

68143725 is a wasteful number, since it uses less digits than its factorization.

68143725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23326 (or 23318 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 68143725 is about 8254.9212594670. The cubic root of 68143725 is about 408.4528744364.

The spelling of 68143725 in words is "sixty-eight million, one hundred forty-three thousand, seven hundred twenty-five".