70016409 has 6 divisors (see below), whose sum is σ = 101134826. Its totient is φ = 46677600.

The previous prime is 70016377. The next prime is 70016431. The reversal of 70016409 is 90461007.

It can be written as a sum of positive squares in only one way, i.e., 68112009 + 1904400 = 8253^2 + 1380^2 .

It is not a de Polignac number, because 70016409 - 2⁵ = 70016377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70016449) 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 5 ways as a sum of consecutive naturals, for example, 3889792 + ... + 3889809.

Almost surely, 2^70016409 is an apocalyptic number.

It is an amenable number.

70016409 is a deficient number, since it is larger than the sum of its proper divisors (31118417).

70016409 is a wasteful number, since it uses less digits than its factorization.

70016409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7779607 (or 7779604 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 70016409 is about 8367.5808331919. The cubic root of 70016409 is about 412.1607304032.

The spelling of 70016409 in words is "seventy million, sixteen thousand, four hundred nine".