70688071 has 4 divisors (see below), whose sum is σ = 71416912. Its totient is φ = 69959232.

The previous prime is 70688063. The next prime is 70688119. The reversal of 70688071 is 17088607.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17088607 = 1471 ⋅11617.

It is a cyclic number.

It is not a de Polignac number, because 70688071 - 2³ = 70688063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70688071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70688021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364275 + ... + 364468.

It is an arithmetic number, because the mean of its divisors is an integer number (17854228).

Almost surely, 2^70688071 is an apocalyptic number.

70688071 is a deficient number, since it is larger than the sum of its proper divisors (728841).

70688071 is an equidigital number, since it uses as much as digits as its factorization.

70688071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728840.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 70688071 is about 8407.6198177606. The cubic root of 70688071 is about 413.4744804254.

The spelling of 70688071 in words is "seventy million, six hundred eighty-eight thousand, seventy-one".