69705421 has 4 divisors (see below), whose sum is σ = 69905500. Its totient is φ = 69505344.

The previous prime is 69705409. The next prime is 69705431. The reversal of 69705421 is 12450796.

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 31203396 + 38502025 = 5586^2 + 6205^2 .

It is a cyclic number.

It is not a de Polignac number, because 69705421 - 2⁹ = 69704909 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 (69705431) 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, 99516 + ... + 100213.

It is an arithmetic number, because the mean of its divisors is an integer number (17476375).

Almost surely, 2^69705421 is an apocalyptic number.

It is an amenable number.

69705421 is a deficient number, since it is larger than the sum of its proper divisors (200079).

69705421 is a wasteful number, since it uses less digits than its factorization.

69705421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200078.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 69705421 is about 8348.9772427526. The cubic root of 69705421 is about 411.5496008837.

The spelling of 69705421 in words is "sixty-nine million, seven hundred five thousand, four hundred twenty-one".