70406409 has 4 divisors (see below), whose sum is σ = 93875216. Its totient is φ = 46937604.

The previous prime is 70406359. The next prime is 70406417. The reversal of 70406409 is 90460407.

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: 90460407 = 3 ⋅30153469.

It is not a de Polignac number, because 70406409 - 2¹³ = 70398217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70406429) 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, 11734399 + ... + 11734404.

It is an arithmetic number, because the mean of its divisors is an integer number (23468804).

Almost surely, 2^70406409 is an apocalyptic number.

It is an amenable number.

70406409 is a deficient number, since it is larger than the sum of its proper divisors (23468807).

70406409 is a wasteful number, since it uses less digits than its factorization.

70406409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23468806.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 70406409 is about 8390.8526980278. The cubic root of 70406409 is about 412.9245758843.

The spelling of 70406409 in words is "seventy million, four hundred six thousand, four hundred nine".