70694509 has 4 divisors (see below), whose sum is σ = 70713820. Its totient is φ = 70675200.

The previous prime is 70694467. The next prime is 70694513. The reversal of 70694509 is 90549607.

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 70509609 + 184900 = 8397^2 + 430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70694509 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 (70694609) 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, 2292 + ... + 12109.

It is an arithmetic number, because the mean of its divisors is an integer number (17678455).

Almost surely, 2^70694509 is an apocalyptic number.

It is an amenable number.

70694509 is a deficient number, since it is larger than the sum of its proper divisors (19311).

70694509 is a wasteful number, since it uses less digits than its factorization.

70694509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19310.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 70694509 is about 8408.0026760224. The cubic root of 70694509 is about 413.4870326041.

The spelling of 70694509 in words is "seventy million, six hundred ninety-four thousand, five hundred nine".