70503209 has 12 divisors (see below), whose sum is σ = 82497924. Its totient is φ = 60074784.

The previous prime is 70503193. The next prime is 70503221. The reversal of 70503209 is 90230507.

It can be written as a sum of positive squares in 2 ways, for example, as 67190809 + 3312400 = 8197^2 + 1820^2 .

It is not a de Polignac number, because 70503209 - 2⁴ = 70503193 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 (70503239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4319 + ... + 12635.

It is an arithmetic number, because the mean of its divisors is an integer number (6874827).

Almost surely, 2^70503209 is an apocalyptic number.

It is an amenable number.

70503209 is a deficient number, since it is larger than the sum of its proper divisors (11994715).

70503209 is a wasteful number, since it uses less digits than its factorization.

70503209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8504 (or 8497 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 70503209 is about 8396.6189028680. The cubic root of 70503209 is about 413.1137290929.

The spelling of 70503209 in words is "seventy million, five hundred three thousand, two hundred nine".