70971605 has 4 divisors (see below), whose sum is σ = 85165932. Its totient is φ = 56777280.

The previous prime is 70971599. The next prime is 70971647. The reversal of 70971605 is 50617907.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50617907 = 79 ⋅640733.

It can be written as a sum of positive squares in 2 ways, for example, as 37075921 + 33895684 = 6089^2 + 5822^2 .

It is not a de Polignac number, because 70971605 - 2⁶ = 70971541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7097156 + ... + 7097165.

It is an arithmetic number, because the mean of its divisors is an integer number (21291483).

Almost surely, 2^70971605 is an apocalyptic number.

It is an amenable number.

70971605 is a deficient number, since it is larger than the sum of its proper divisors (14194327).

70971605 is a wasteful number, since it uses less digits than its factorization.

70971605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14194326.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 70971605 is about 8424.4646714198. The cubic root of 70971605 is about 414.0265663987.

The spelling of 70971605 in words is "seventy million, nine hundred seventy-one thousand, six hundred five".