70420013 has 4 divisors (see below), whose sum is σ = 70450368. Its totient is φ = 70389660.

The previous prime is 70419989. The next prime is 70420027. The reversal of 70420013 is 31002407.

It is a happy number.

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: 31002407 = 17 ⋅1823671.

It is a cyclic number.

It is not a de Polignac number, because 70420013 - 2²⁰ = 69371437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70419973 and 70420000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70420513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11381 + ... + 16442.

It is an arithmetic number, because the mean of its divisors is an integer number (17612592).

Almost surely, 2^70420013 is an apocalyptic number.

It is an amenable number.

70420013 is a deficient number, since it is larger than the sum of its proper divisors (30355).

70420013 is a wasteful number, since it uses less digits than its factorization.

70420013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30354.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 70420013 is about 8391.6633035412. The cubic root of 70420013 is about 412.9511694110.

The spelling of 70420013 in words is "seventy million, four hundred twenty thousand, thirteen".