70275709 has 4 divisors (see below), whose sum is σ = 80315104. Its totient is φ = 60236316.

The previous prime is 70275707. The next prime is 70275727. The reversal of 70275709 is 90757207.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90757207 = 569 ⋅159503.

It is not a de Polignac number, because 70275709 - 2¹ = 70275707 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 (70275703) 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, 5019687 + ... + 5019700.

It is an arithmetic number, because the mean of its divisors is an integer number (20078776).

Almost surely, 2^70275709 is an apocalyptic number.

It is an amenable number.

70275709 is a deficient number, since it is larger than the sum of its proper divisors (10039395).

70275709 is a wasteful number, since it uses less digits than its factorization.

70275709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10039394.

The product of its (nonzero) digits is 30870, while the sum is 37.

The square root of 70275709 is about 8383.0608371883. The cubic root of 70275709 is about 412.6689046897.

The spelling of 70275709 in words is "seventy million, two hundred seventy-five thousand, seven hundred nine".