70205009 has 12 divisors (see below), whose sum is σ = 81313344. Its totient is φ = 59377032.

The previous prime is 70204973. The next prime is 70205059. The reversal of 70205009 is 90050207.

It is not a de Polignac number, because 70205009 - 2¹² = 70200913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70205059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42884 + ... + 44490.

It is an arithmetic number, because the mean of its divisors is an integer number (6776112).

Almost surely, 2^70205009 is an apocalyptic number.

70205009 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

70205009 is a deficient number, since it is larger than the sum of its proper divisors (11108335).

70205009 is an equidigital number, since it uses as much as digits as its factorization.

70205009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772 (or 1693 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 70205009 is about 8378.8429392130. The cubic root of 70205009 is about 412.5304714558.

The spelling of 70205009 in words is "seventy million, two hundred five thousand, nine".