70216909 has 4 divisors (see below), whose sum is σ = 80247904. Its totient is φ = 60185916.

The previous prime is 70216901. The next prime is 70216933. The reversal of 70216909 is 90961207.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90961207 = 37 ⋅2458411.

It is not a de Polignac number, because 70216909 - 2³ = 70216901 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 (70216901) 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, 5015487 + ... + 5015500.

It is an arithmetic number, because the mean of its divisors is an integer number (20061976).

Almost surely, 2^70216909 is an apocalyptic number.

It is an amenable number.

70216909 is a deficient number, since it is larger than the sum of its proper divisors (10030995).

70216909 is a wasteful number, since it uses less digits than its factorization.

70216909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10030994.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 70216909 is about 8379.5530310393. The cubic root of 70216909 is about 412.5537786022.

The spelling of 70216909 in words is "seventy million, two hundred sixteen thousand, nine hundred nine".