70688125 has 20 divisors (see below), whose sum is σ = 93541932. Its totient is φ = 53216000.

The previous prime is 70688119. The next prime is 70688129. The reversal of 70688125 is 52188607.

It can be written as a sum of positive squares in 10 ways, for example, as 63059481 + 7628644 = 7941^2 + 2762^2 .

It is a de Polignac number, because none of the positive numbers 2^k-70688125 is a prime.

It is a super-2 number, since 2×70688125² = 9993622032031250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70688129) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7299 + ... + 13951.

Almost surely, 2^70688125 is an apocalyptic number.

It is an amenable number.

70688125 is a deficient number, since it is larger than the sum of its proper divisors (22853807).

70688125 is an equidigital number, since it uses as much as digits as its factorization.

70688125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6690 (or 6675 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 70688125 is about 8407.6230291326. The cubic root of 70688125 is about 413.4745857124.

It can be divided in two parts, 706 and 88125, that added together give a triangular number (88831 = T₄₂₁).

The spelling of 70688125 in words is "seventy million, six hundred eighty-eight thousand, one hundred twenty-five".