70235909 has 4 divisors (see below), whose sum is σ = 70475916. Its totient is φ = 69995904.

The previous prime is 70235897. The next prime is 70235917. The reversal of 70235909 is 90953207.

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 37173409 + 33062500 = 6097^2 + 5750^2 .

It is a cyclic number.

It is not a de Polignac number, because 70235909 - 2¹² = 70231813 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70235309) 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, 119564 + ... + 120149.

It is an arithmetic number, because the mean of its divisors is an integer number (17618979).

Almost surely, 2^70235909 is an apocalyptic number.

It is an amenable number.

70235909 is a deficient number, since it is larger than the sum of its proper divisors (240007).

70235909 is a wasteful number, since it uses less digits than its factorization.

70235909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240006.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 70235909 is about 8380.6866663776. The cubic root of 70235909 is about 412.5909862349.

The spelling of 70235909 in words is "seventy million, two hundred thirty-five thousand, nine hundred nine".