70497709 has 4 divisors (see below), whose sum is σ = 70568316. Its totient is φ = 70427104.

The previous prime is 70497703. The next prime is 70497719. The reversal of 70497709 is 90779407.

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 2022084 + 68475625 = 1422^2 + 8275^2 .

It is a cyclic number.

It is not a de Polignac number, because 70497709 - 2¹¹ = 70495661 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 (70497703) 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, 33784 + ... + 35809.

It is an arithmetic number, because the mean of its divisors is an integer number (17642079).

Almost surely, 2^70497709 is an apocalyptic number.

It is an amenable number.

70497709 is a deficient number, since it is larger than the sum of its proper divisors (70607).

70497709 is a wasteful number, since it uses less digits than its factorization.

70497709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70606.

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 70497709 is about 8396.2913837003. The cubic root of 70497709 is about 413.1029863923.

The spelling of 70497709 in words is "seventy million, four hundred ninety-seven thousand, seven hundred nine".