70688887 has 4 divisors (see below), whose sum is σ = 70930440. Its totient is φ = 70447336.

The previous prime is 70688869. The next prime is 70688923. The reversal of 70688887 is 78888607.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70688887 - 2¹¹ = 70686839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70688287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120337 + ... + 120922.

It is an arithmetic number, because the mean of its divisors is an integer number (17732610).

Almost surely, 2^70688887 is an apocalyptic number.

70688887 is a deficient number, since it is larger than the sum of its proper divisors (241553).

70688887 is a wasteful number, since it uses less digits than its factorization.

70688887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241552.

The product of its (nonzero) digits is 1204224, while the sum is 52.

The square root of 70688887 is about 8407.6683450288. The cubic root of 70688887 is about 413.4760714240.

The spelling of 70688887 in words is "seventy million, six hundred eighty-eight thousand, eight hundred eighty-seven".