70538809 has 4 divisors (see below), whose sum is σ = 76951440. Its totient is φ = 64126180.

The previous prime is 70538803. The next prime is 70538821. The reversal of 70538809 is 90883507.

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.

It is a cyclic number.

It is not a de Polignac number, because 70538809 - 2¹⁹ = 70014521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70538803) 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, 3206299 + ... + 3206320.

It is an arithmetic number, because the mean of its divisors is an integer number (19237860).

Almost surely, 2^70538809 is an apocalyptic number.

It is an amenable number.

70538809 is a deficient number, since it is larger than the sum of its proper divisors (6412631).

70538809 is a wasteful number, since it uses less digits than its factorization.

70538809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412630.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 70538809 is about 8398.7385362327. The cubic root of 70538809 is about 413.1832501558.

The spelling of 70538809 in words is "seventy million, five hundred thirty-eight thousand, eight hundred nine".