70905697 has 4 divisors (see below), whose sum is σ = 70927380. Its totient is φ = 70884016.

The previous prime is 70905683. The next prime is 70905713. The reversal of 70905697 is 79650907.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37161216 + 33744481 = 6096^2 + 5809^2 .

It is a cyclic number.

It is not a de Polignac number, because 70905697 - 2¹⁵ = 70872929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70905617) 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, 4822 + ... + 12847.

It is an arithmetic number, because the mean of its divisors is an integer number (17731845).

Almost surely, 2^70905697 is an apocalyptic number.

It is an amenable number.

70905697 is a deficient number, since it is larger than the sum of its proper divisors (21683).

70905697 is a wasteful number, since it uses less digits than its factorization.

70905697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21682.

The product of its (nonzero) digits is 119070, while the sum is 43.

The square root of 70905697 is about 8420.5520602868. The cubic root of 70905697 is about 413.8983643559.

The spelling of 70905697 in words is "seventy million, nine hundred five thousand, six hundred ninety-seven".